109 pubblicazioni classificate nel seguente modo:

Evaluation of the rejuvenating effect of different additives on bituminous mixtures including hot-recycled RA as a function of the production temperature
ROAD MATERIALS AND PAVEMENT DESIGN
Autore/i: Prosperi, E.; Bocci, E.; Bocci, M.
Classificazione: 1 Contributo su Rivista
Abstract: The increasing bitumen cost, the growth of the traffic loads and the need to find more sustainable paving practices are forcing agencies to identify new ways to maximise the re-use of Reclaimed Asphalt (RA). If RA could theoretically be 100% recycled, its content in bituminous layers is still restricted in most countries mainly due to legislation limitations and technical issues. In particular, the stiffer and more brittle mixes, usually resulting from RA addition, have raised concerns about the long-term properties of the pavement. In order to further increase the amount of usable RA, rejuvenating additives can be included in the mixtures. The paper deals with the analysis of seven additives, with particular focus on their ability in mitigating the effects of the presence of RA in the mix as a function of production temperature. In particular, FTIR analysis was carried out on the additives to evaluate the differences in their chemical composition. Moreover, the mechanical properties of the mixtures including 50% RA and produced at 140°C or 170°C were investigated. The results showed the reduction of the mixing temperature from 170°C to 140°C determined a slight increase of the air voids content but also allowed a significant decrease of mix stiffness and strength with a contemporary increase of ductility. The mixtures containing 50% RA and the additive had an intermediate behaviour between the mix without RA and the mix with 50% RA and no additive. The additives investigated in this research showed, in most cases, different chemical structures, which reflected in their rejuvenating performance. The comparative analysis of the results from mechanical and chemical tests provided remarkable information about the characteristic properties of a good rejuvenator, particularly the presence of esters and the high flashpoint.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/295409

Evaluation of the rheological and performance behaviour of bitumen modified with compounds including crumb rubber from waste tires
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Carpani, C.; Bocci, E.; Prosperi, E.; Bocci, M.
Classificazione: 1 Contributo su Rivista
Abstract: The recycling of waste tires is one of the greatest concern the researcher have been addressing worldwide. In the field of road materials, several solutions have been studied but all of them present some issues, great or small. In the present study, the possibility to recycle the crumb rubber from waste tires in the production of compounds for bitumen modification was evaluated. In particular, physical, rheological and fatigue tests were carried out on three different compound-modified bitumens and on a reference SBS-modified bitumen. In particular, penetration, softening point, elastic recovery, performance grade, complex modulus, rheological parameters and fatigue resistance were measured in the laboratory at different ageing levels. The results showed that the bitumen including 6% by weight of the compound made of waste rubber and radial SBS had analogous or better performance compared to the reference bitumen including 4.8% of radial SBS in terms of physical properties, lowtemperature behaviour, stiffness, elasticity, ageing sensitivity and fatigue resistance. The findings are very promising and encourage future investigations at mix scale.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/314198

Effect of Bitumen Production Process and Mix Heating Temperature on the Rheological Properties of Hot Recycled Mix Asphalt
SUSTAINABILITY
Autore/i: Prosperi, E.; Bocci, E.; Bocci, M.
Classificazione: 1 Contributo su Rivista
Abstract: Heavy traffic loads require the replacement of damaged pavements, so a huge amount of reclaimed asphalt pavement (RAP) material is now available and must be recycled in order to avoid landfill and to achieve both environmental and economic benefits. The most common and profitable solution to reuse RAP is associated with the hot recycling technique, as it allows recovering both solid and binding components of RAP. Several factors influence the performance of hot recycled mix asphalt (HRMA). Among those, this paper focuses on the role played by the origin of the virgin bitumen, i.e. the oil-distillation process, and by the mixing temperature adopted during HRMA production. The objective was to evaluate the rheological properties of mixtures produced using a high amount of RAP (50%), two different rejuvenators, two mixing temperatures (140 degrees C or 170 degrees C) and two neat bitumen types derived from different distillation processes (visbreaker and straight-run). The results showed that the addition of RAP led to an increase in the dynamic modulus and a decrease in the phase angle, while the use of rejuvenators partly tended to rebalance these characteristics. The visbreaker bitumen showed a higher sensitivity to short-term aging than the straight-run, determining higher mix stiffness and lower viscous features. The higher mixing temperature also determined an increase in the complex modulus and a reduction in the phase angle as a result of the higher mobilization of the aged bitumen from the RAP.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/314199

Rheological and performance characterisation of the bitumen recovered from different emulsions for cold mixtures
ROAD MATERIALS AND PAVEMENT DESIGN
Autore/i: Carpani, C.; Bocci, E.; Bocci, M.
Classificazione: 1 Contributo su Rivista
Abstract: In recent years, over-stabilized polymer-modified bitumen emulsions have been widely used to improve the mechanical properties of cold bituminous mixtures. However, the effect of the polymer modification process on the emulsion performance have not been investigated. The present paper deals with the analysis of the binders recovered from a reference unmodified bitumen emulsion and two polymer-modified emulsions, respectively including SBR-latex added after bitumen emulsification (post-blending) and SBS added before bitumen emulsification (pre-blending). The laboratory investigation included the linear viscoelastic characterisation and the evaluation of the resistance to permanent deformations and damage. The results showed that the polymer-modified bitumen emulsions have a more pronounced elasticity with respect to the unmodified emulsion, allowing achieving a higher performance against permanent deformations and fatigue. In addition, the SBS modified bitumen emulsion (pre-blending) has better properties than the latex modified emulsion (post-blending), as a consequence of the different chemical structure that the modification process produces.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/295408

Ageing and cooling of hot-mix-asphalt during hauling and paving—a laboratory and site study
SUSTAINABILITY
Autore/i: Bocci, E.; Prosperi, E.; Mair, V.; Bocci, M.
Classificazione: 1 Contributo su Rivista
Abstract: In road construction, it can happen that, for different reasons, the time between hot-mix asphalt (HMA) production and paving is extended to some hours. This can be reflected in several problems such as mix cooling and temperature segregation, but also in an extremely severe bitumen ageing due to its prolonged exposure to high temperatures. This paper deals with the investigation of these phenomena both in the laboratory and on site. In particular, the first part of the research aimed at observing the influence of the conditioning time, when the loose HMA is kept in the oven at a high temperature, on the mix properties. The second part focused on the ageing/cooling that happens on site during HMA hauling, as a function of time and type of truck. Temperatures were monitored using a thermal camera and different probes, and gyratory compactor specimens were produced by sampling some HMA from the trucks every 1 h for 3 h. The results showed that HMA stiffness rises if the time when the loose mix stays in the laboratory oven before compaction increases. However, on site, the HMA volumetric and mechanical properties do not change with hauling time up to 3 h, probably because the external material in the truck bed protects the HMA core from the access of oxygen, hindering bitumen oxidation and loss of volatiles. The temperature monitoring highlighted that temperature segregation, after 3 h hauling, can be higher than 30 °C but it can be reduced using insulated truck beds.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/288094

Mechanical Characterization and Chemical Identification of Clear Binders for Road Surface Courses
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
Autore/i: Grilli, A.; Bocci, M.; Virgili, A.; Conti, C.
Classificazione: 1 Contributo su Rivista
Abstract: The development of non-black asphalt mixtures for surface courses may play a significant role to improve functional, aesthetic and environmental issues of road pavements. Nowadays, the development of clear binders as substitutes for traditional bitumen in asphalt mixtures, which combine durability and mechanical properties, exalting the color of pavements for a better integration of road networks in urban and environmentally sensitive areas, is undoubtedly a timing challenge. However, the selection and classification of clear binders are often based only on color and standard requirements referred to traditional bitumen that do not describe consistently the binder behavior. A better understanding on clear binder properties is required to guide the aggregate selection and the mix design for surface layer, merging safety, aesthetical and environmental benefits into long lasting pavement. This paper presents a comprehensive experimental program, including empirical tests, infrared spectrum analysis, and rheological testing over a wide range of temperature and frequency, to determine the overall mechanical behavior of three clear binders. Results highlighted that the selected clear binders differ from traditional bitumen in terms of mechanical behavior. Different composition or origin can induce to completely different performance. Moreover, the combination of several testing procedures allowed suggesting specific application methods and uses for the three clear binders.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/288101

Cold in-place recycling for a base layer of an Italian high-traffic highway
Lecture Notes in Civil Engineering
Autore/i: Bocci, Edoardo; Graziani, Andrea; Bocci, M.
Editore: Springer
Classificazione: 2 Contributo in Volume
Abstract: Cold in-place recycling (CIR) has increasing interest worldwide due to the large economic and environmental benefits deriving from reduction of atmospheric emissions, preservation of natural resources, no hauling of the material to the recycling plant and back to the jobsite. However, a unique protocol for the structural rehabilitation of highly trafficked highways based on CIR has not been still developed, discouraging their application in the upper layers of the pavement (base layer). This paper describes a case study where a cold recycled asphalt base (CRAB), containing 100% of reclaimed asphalt treated with polymer-modified bitumen emulsion and cement, has been applied in the reconstruction of the SS268 divided highway in southern Italy. The technical approach followed in this project included the preliminary execution of falling weight deflectometer tests to estimate the subgrade stiffness, the design of the pavement structure through a mechanistic-empirical procedure, the mix design of the CRAB and the validation of the construction procedure and mix properties in a trial section. This paper aims to provide a protocol for the design and construction of CIR mixtures, allowing their use as base layer for the highways interested by a high traffic.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/271155

Recommendation of RILEM TC237-SIB on fragmentation test for recycled asphalt
MATERIALS AND STRUCTURES
Autore/i: Tebaldi, G.; Dave, E.; Cannone Falchetto, A.; Hugener, M.; Perraton, D.; Grilli, A.; Lo Presti, D.; Pasetto, M.; Loizos, A.; Jenkins, K.; Apeagyei, A.; Grenfell, J.; Bocci, M.
Classificazione: 1 Contributo su Rivista
Abstract: This recommendation describes how to characterize the reclaimed asphalt through the fragmentation test. The guidelines given hereafter are based on the results of a round robin test organized by the RILEM Technical Committee 237-SIB ‘‘Testing and characterization of sustainable innovative bituminous materials and systems’’ and provide information on the testing procedure, data analysis and indications for the preparation of a test report.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/271194

Sustainable Engineering for Resilient Built and Natural Environments
The First Outstanding 50 Years of “Università Politecnica delle Marche”
Autore/i: Alici, Antonello; Bocci, Maurizio; Bonvini, Paolo; Brocchini, Maurizio; Calamai, Alessandro; Canestrari, Francesco; Capozucca, Roberto; Carbonari, Alessandro; Carbonari, Sandro; Cardone, Fabrizio; Clementi, Francesco; Clini, Paolo; Cocchi, Giammichele; Corvaro, Sara; Darvini, Giovanna; Davì, Fabrizio; Dezi, Luigino; Di Giuseppe, Elisa; D’Orazio, Marco; Ferretti, Maddalena; Ferrotti, Gilda; Gara, Fabrizio; Giretti, Alberto; Graziani, Andrea; Lancioni, Giovanni; Lemma, Massimo; Lenci, Stefano; Lorenzoni, Carlo; Malinverni, Eva Savina; Mancinelli, Alessandro; Mariano, Fabio; Mentrasti, Lando; Mondaini, Gianluigi; Montecchiari, Piero; Munafò, Placido; Naticchia, Berardo; Postacchini, Matteo; Quagliarini, Enrico; Quattrini, Ramona; Ragni, Laura; Serpilli, Michele; Soldini, Luciano; Virgili, Amedeo; Zampini, Giovanni
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/272866

Complex Modulus Testing and Rheological Modeling of Cold-Recycled Mixtures
JOURNAL OF TESTING AND EVALUATION
Autore/i: Graziani, Andrea; Mignini, Chiara; Bocci, Edoardo; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: This research compares the rheological behavior of different cold-recycled mixtures (CRMs) produced in-place through full-depth reclamation. Reclaimed asphalt pavement (RAP) obtained from the milling of the old asphalt layers was blended with reclaimed unbound aggregate from the existing subgrade. Asphalt emulsion, foamed asphalt, and portland cement were employed as stabilizing agents. The complex modulus was measured on cylindrical cores, applying a sinusoidal strain with an amplitude of 30 microstrain at testing temperatures ranging from 0°C to 50°C and frequencies ranging from 0.1 to 20 Hz. The Huet-Sayegh (HS) rheological model was applied to simulate the experimental data. The results showed that the behavior of CRM is thermo- and frequency-dependent and that the time-temperature superposition principle can be applied. The HS model provides an excellent fitting of the dynamic modulus data, whereas fitting of the loss angle data was improved, introducing a temperature- and frequency-independent correction. The RAP influences the rheological behavior, but viscous dissipation is mainly due to the asphalt-stabilizing agents (emulsion residue or foamed asphalt).
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/268080

Comparison of short term laboratory ageing on virgin and recovered binder from HMA/WMA mixtures
RILEM Bookseries
Autore/i: Ferrotti, Gilda; Baaj, Hassan; Besamusca, Jeroen; Bocci, Maurizio; Cannone Falchetto, Augusto; Grenfell, James; Hofko, Bernhard; Porot, Laurent; Poulikakos, Lily D.; You, Zhanping
Editore: Springer Netherlands
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Oxidative ageing strongly affects asphalt mixture behavior. The Rolling Thin Film Oven Test (RTFOT) is currently used to simulate within a laboratory environment the binder short-term ageing, assuming that the mixture is produced at conventional Hot Mix Asphalt (HMA) temperatures (ca 160 °C). However, the introduction of Warm Mix Asphalts (WMAs), which are produced at lower temperatures than HMAs, could require adjustments in the short-term ageing simulation procedure as ageing is strongly influenced by the mixing and compaction temperatures. In this study, the physical properties of a straight-run bitumen, before ageing and after RTFOT ageing at two temperatures (123 °C and 163 °C), are compared to those of the same bitumen recovered from a HMA and a foamed WMA, both produced in laboratory. This comparison aims at determining the best RTFOT temperature for short-term ageing simulation for WMAs. To this end, all the binders were investigated through conventional (penetration value at 25 °C and softening point temperature) and rheological (frequency sweeps with dynamic shear rheometer) tests. Both conventional and rheological tests indicate that the WMA recovered binder is less aged than the binder aged at the standard conditioning temperature of 163 °C, whereas the HMA recovered binder is more aged than the artificially aged binder in the laboratory with RTFOT at 163 °C. These initial results support the idea that an appropriate ageing temperature for RTFOT short-term ageing simulation of WMA needs to be identified.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/265195

Research and Engineering for Resilient Infrastructures and Environment Protection
The First Outstanding 50 Years of “Università Politecnica delle Marche”
Autore/i: Bocci, Maurizio; Brocchini, Maurizio; Canestrari, Francesco; Cardone, Fabrizio; Corvaro, Sara; Darvini, Giovanna; Ferrotti, Gilda; Graziani, Andrea; Lorenzoni, Carlo; Mancinelli, Alessandro; Postacchini, Matteo; Soldini, Luciano; Virgili, Amedeo
Classificazione: 2 Contributo in Volume
Abstract: We discuss the contribution of the research groups that work at UNIVPM in the field of infrastructure engineering to the design of resilient hydraulic and transportation infrastructures and related solutions for the protection of the environment. After recalling the long history of research and engineering intervention of the groups of Hydraulics and Transportation Infrastructures of UNIVPM, we show how the activities of such groups are becoming of increasing importance in response to the growing request of innovative solutions for resilient infrastructures (e.g. coastal protection and maritime structures, road and airport pavements) and environment protection (e.g. coastal and river flood, air pollution, waste recycling and materials reuse). Such activities have been recently boosted by the resources made available to the two groups through the “Dipartimenti di Eccellenza” award, which largely focuses on the issue of engineering for resilient built and natural environments. A projection in the future of the activities of above is also proposed.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/273420

Riciclaggio a caldo del fresato di asphalt rubber
STRADE & AUTOSTRADE
Autore/i: Bocci, E.; Bocci, M.
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/277476

Complex Modulus of Cold Recycled Mixtures: measurement and modelling
2018 ISAP Conference
Autore/i: Graziani, Andrea; Mignini, Chiara; Bocci, Edoardo; Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In the present study, the complex modulus E* of three types of cold recycled mixtures was measured in the laboratory using cyclic compression tests. The mixtures, that were produced in situ using the full-depth reclamation technique, were characterised by the same 100% reclaimed aggregate composition, whereas bitumen emulsion, foamed bitumen and portland cement were employed as binding agents. Complex modulus testing was carried out on cylindrical specimens cored from the pavement seven years after construction. A sinusoidal strain with amplitude of 30 microstrain was applied at testing temperatures ranging from 0 to 50 °C and frequencies ranging from 0.1 to 20 Hz. Results showed that the time-temperature superposition principle was fully verified for the stiffness modulus whereas some discrepancy was highlighted by the loss angle. The Huet-Sayegh rheological model was applied to simulate the experimental data. Model fitting based only on the stiffness modulus provided excellent results. Indeed, the fitted rheological model was also able to simulate the loss angle variation quite well, but with some underestimation (about 3°) of the measured values. It can be concluded that other dissipation mechanism, in addition to the “classical” viscous type, were influent for behaviour of the studied cold recycled mixtures.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/259785

Comparison between bitumen aged in laboratory and recovered from HMA and WMA lab mixtures
MATERIALS AND STRUCTURES
Autore/i: Ferrotti, Gilda; Baaj, Hassan; Besamusca, Jeroen; Bocci, Maurizio; Cannone-Falchetto, Augusto; Grenfell, James; Hofko, Bernhard; Porot, Laurent; Poulikakos, Lily; You, Zhanping
Classificazione: 1 Contributo su Rivista
Abstract: Oxidative ageing is an important phenomenon affecting asphalt concrete. Currently, binder short-term ageing, occurring during mixture production and laying, is simulated worldwide through rolling thin film oven test (RTFOT), which was developed assuming that the mixture is produced at conventional hot mix asphalt (HMA) temperatures around 160 °C. However, since ageing is strongly influenced by temperature, lower production temperatures imply less material ageing so that the introduction of warm mix asphalt (WMA) technologies could potentially require some adjustments in the ageing simulation procedures. This study aims at determining which RTFOT temperature simulates WMA short-term ageing more closely. To this end, the chemical and the mechanical characteristics of one type of bitumen, recovered from two asphalt mixtures (WMA and HMA) prepared and short-term aged in laboratory, were compared to those of the same virgin binder short-term aged in laboratory with RTFOT at different temperatures (123 °C and 163 °C). Both conventional and rheological tests show higher ageing levels for the binder recovered from HMA with respect to the binder aged with RTFOT at 163 °C, whereas the binder recovered from WMA generally provides an ageing level lower than the binder aged with RTFOT at 163 °C. These results are also confirmed by the chemical analysis using FTIR which indicate higher oxidation levels for the hot mix process compared to the warm mix. These preliminary results confirm that it is necessary to identify an appropriate ageing temperature for the short-term ageing simulation of WMAs with RTFOT.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/265194

Recommendation of RILEM TC237-SIB: protocol for characterization of recycled asphalt (RA) materials for pavement applications
MATERIALS AND STRUCTURES
Autore/i: Tebaldi, Gabriele; Dave, Eshan V.; Cannone Falchetto, Augusto; Hugener, Martin; Perraton, Daniel; Grilli, Andrea; Lo Presti, Davide; Pasetto, Marco; Loizos, Andreas; Jenkins, Kim; Apeagyei, Alex; Grenfell, James; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: This recommendation proposes an experimental protocol to characterize recycled asphalt materials. The guidelines presented in this document are based on the results of a round robin test organized by the RILEM Technical Committee 237-SIB “Testing and characterization of sustainable innovative bituminous materials and systems” and provide information on the testing procedure, data analysis and indications for the preparation of a test report.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/265193

Cold recycling of reclaimed asphalt pavements
RILEM State-of-the-Art Reports
Autore/i: Tebaldi, Gabriele; Dave, Eshan; Hugener, Martin; Falchetto, Augusto Cannone; Perraton, Daniel; Grilli, Andrea; Presti, Davide Lo; Pasetto, Marco; Loizos, Andreas; Jenkins, Kim; Apeagyei, Alex; Grenfell, James; Bocci, Maurizio
Editore: Springer Netherlands
Classificazione: 2 Contributo in Volume
Abstract: Pavement engineers have in front of them multiple challenges linked to addressing issues related to social development and society’s expanding needs. One of the most substantial of these issues is perhaps how to effectively rehabilitate and/or maintain the existing road network while preserving and sustaining limited natural resources. The re-usage of existing pavement materials to reconstruct/rehabilitate our future pavements is the solution that is now more and more selected by the different road administrations around the world. However, upon closer inspection, one can find many areas and details, not negligible issues, that are simply extensions of HMA technology (i.e. mix design process in cold recycling) or empirical arrangements; in particular RAP still does not have an internationally recognized classification. So SIB – TG6 decided to develop a classification protocol of RAP, depending on its intended application. The objective has been followed by considering the procedures generally utilized to classify the natural aggregates: tests able to identify the main components (i.e. the geometrical and mechanical properties of aggregates and the characterization of recovered bitumen for RAP) and provide information on their behaviour under specific conditions, near to real life usage (e.g. the Los Angeles test for aggregates gives an idea of the potential behaviour of aggregates under the action of a roller compactor). The following sections illustrate and explain the actions of the TG in order to achieve the goals outlined above: the review of current standards, the protocol designed to classify RAP and the round robin tests carried out to validate the protocol.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/265191

Recommendation of RILEM TC237-SIB on cohesion test of recycled asphalt
MATERIALS AND STRUCTURES
Autore/i: Tebaldi, Gabriele; Dave, Eshan; Cannone Falchetto, Augusto; Hugener, Martin; Perraton, Daniel; Grilli, Andrea; Lo Presti, Davide; Pasetto, Marco; Loizos, Andreas; Jenkins, Kim; Apeagyei, Alex; Grenfell, James; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: This recommendation describes how to evaluate the presence of potentially active bitumen in recycled asphalt (RA) materials through the cohesion test. The experimental protocol is designed according to the research performed by the RILEM Technical Committee 237-SIB ‘‘Testing and characterization of sustainable innovative bituminous materials and systems’’ with the purpose, to develop a new, simple and fast method for the characterization of RA while limiting the need for conventional rheological tests. The guidelines in this recommendation focus on the testing procedure including specimen preparation, data analysis and provide information on the preparation of a tests report.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/265192

The evolution of the mechanical behaviour of cold recycled mixtures stabilised with cement and bitumen: field and laboratory study
ROAD MATERIALS AND PAVEMENT DESIGN
Autore/i: Godenzoni, Carlotta; Graziani, Andrea; Bocci, Edoardo; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Road construction and maintenance involve huge amounts of materials that can include wastes from the demolition of old asphalt pavements. Recycling allows environmental and economic benefits to be achieved, by reducing the consumption of natural resources. These advantages are maximised with cold-recycling, in particular when full depth reclamation (FDR) is adopted as road rehabilitation technique. The aim of this research was to compare different FDR tech- niques, which produce cement-treated material and cement–bitumen treated material (CBTM) combining the use of cement and bitumen emulsion or foamed bitumen. The FDR was applied in a trial section built along an in-service highway and monitored with annual falling weight deflectometer (FWD) surveys in order to evaluate the performance evolution. Results high- lighted that, because of the effect of temperature, the FWD deflections were not suitable to accurately evaluate the evolution of the mechanical behaviour of the cold recycled mixture (CRM) layers. However, the temperature-corrected FWD moduli allowed to conclude that the performance of the CRM layers was similar.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/245814

Influence of production temperature and additive dosage on warm mix asphalt performance
Proceedings of the World Conference on Pavement and Asset Management (WCPAM) 2017
Autore/i: Stimilli, Arianna; Frigio, Francesca; Bocci, Maurizio; Canestrari, Francesco
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/325616

An application of the Michaelis–Menten model to analyze the curing process of cold recycled bituminous mixtures
INTERNATIONAL JOURNAL OF PAVEMENT RESEARCH AND TECHNOLOGY
Autore/i: Graziani, Andrea; Godenzoni, Carlotta; Cardone, Fabrizio; Bocci, Edoardo; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: In this paper the laboratory curing process of two types of cold recycled mixtures manufactured during the construction of an experimental pavement section along an Italian motorway was investigated. Specifically, a cement–bitumen treated material (CBTM) mixture and a cement treated material CTM) mixture, produced both on site and in laboratory, were tested. Moisture loss by evaporation (DW), indirect tensile stiffness modulus (ITSM) and indirect tensile strength (ITS) were measured in order to evaluate the curing process. The measured data were analyzed using the nonlinear Michaelis–Menten (MM) model with the aim to characterize the rate at which the mixture properties evolve over time and their values at the long-term cured state. The results showed that the adopted curing variables (DW, ITSM and ITS) gave a comparable description of the curing process, when evaporation was llowed and that the MM model gave an appropriate description of the evolutive behavior of CBTMs and CTMs. Finally, the results showed that in the initial curing stage the effect of cement hydration prevailed on that of emulsion breaking.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246524

Rheological characterization of cold bituminous mastics produced with different mineral additions
Transport Infrastructure and Systems
Autore/i: Godenzoni, Carlotta; Bocci, Maurizio; Graziani, Andrea
Editore: CRC Press/Balkema
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246601

Instrumented test section for analyzing the curing process of cold-recycled mixtures
Bearing Capacity of Roads, Railways and Airfields
Autore/i: Godenzoni, C.; Graziani, A.; Bocci, M.; Grilli, A.; Bocci, E.
Editore: CRC Press
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: An instrumented pavement section was realized during the widening of an Italian motor- way in order to evaluate the curing process and performance of two types of cold-recycled mixtures: a cement treated material (3% of cement) and a cement-bitumen treated material (2% of cement and 3% of bitumen emulsion). The mixtures were fabricated in place by full-depth reclamation and, before the construction of the upper courses, the recycled layer was instrumented with pressure cells, asphalt strain gauges, time domain reflectometer probes and ther mistors. After construction, part of the recycled layer was sealed with bitumen emulsion in order to evaluate the effect of free or prevented water evaporation on the curing process. This paper describes the site preparation, the pavement construction phases, sen- sor installation and the setup of the data acquisition system. The moisture data recorded by the time domain reflectometer probes during 90 days are presented. Results show that moisture loss was higher for the cement treated material that was characterized by higher cement content. In addition, covering the layer with a bitumen emulsion membrane (i.e. preventing water evaporation) induced a marked reduction (around 50%) of the initial curing rate
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/259786

Effect of ageing process on bitumen and rejuvenated bitumen
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Grilli, Andrea; Gnisci, Marco Iorio; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: In the last few decades, highway agencies and the paving companies have invested huge efforts on increasing the amount of reclaimed asphalt (RA) to be introduced in the production of new asphalt concrete (AC). This technique, so-called hot recycling of RA, offers several economical and environmental advantages tightly related to the replacing of natural materials, such as aggregates and bitumen, with recycled one. Indeed, the hot recycling of RA implies a reduction of the virgin aggregate and bitumen supply to produce AC. Additionally, hot recycling allows decreasing the amount of RA disposal. However, when a high amount of RA is hot recycled, the mechanical properties of aged bitumen must be considered for an appropriate mix design. In this case, recycling additives are used to achieve good mechanical performance. This paper deals with the effect of ageing and of a specific rejuvenator on mechanical properties of a paving grade bitumen. Moreover, the effect of ageing on mechanical properties of the rejuvenated bitumen is investigated. The results showed that the stiffening effect of ageing can be reduced or restored by the use of the rejuvenator. In addition, the ageing process affects the rejuvenated bitumen as well as it does for paving grade bitumen.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246651

Evaluation of mechanical performance of cement–bitumen-treated materials through laboratory and in-situ testing
ROAD MATERIALS AND PAVEMENT DESIGN
Autore/i: Meocci, Monica; Grilli, Andrea; La Torre, Francesca; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Nowadays, cold recycling is considered as a common road construction/maintenance technique and no longer as an alternative technique to the traditional ones. The difficulties in simulating the production and construction processes in laboratory have led researchers to practise full-scale testing of mixtures. This paper presents a comprehensive evaluation of the mechanical performance of a cement-bitumen-treated materials (CBTMs) containing 80% of reclaimed asphalt. After a preliminary mix design, the mixture was produced in a mix plant and laid down on two trial sections with different layer thicknesses (15 and 20cm) over a homogeneous subgrade. The mixture was sampled before laying, compacted and characterised through indirect tensile test and indirect tensile stiffness modulus test. The same tests were carried out on cores taken from the trial sections. Light weight deflectometer and falling weight deflectometer surveys were performed on the trial sections to evaluate the performances of the CBTMs.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246650

Adhesion properties of warm recycled mixtures produced with different WMA additives
Functional Pavement Design
Autore/i: Frigio, Francesca; Stimilli, Arianna; Bocci, Maurizio; Canestrari, Francesco
Editore: CRC Press, Taylor & Francis Group
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Eco-friendly, cost-saving and sustainable pavements have become a priority goal due to increased costs of raw materials and strict environmental regulations. To address these challenges, the use of Reclaimed Asphalt Pavements (RAP) and Warm Mix Asphalt (WMA) technologies is becoming more and more frequent in the asphalt industry. Adhesion properties and water susceptibility are major concerns associated with the use of WMA mixtures due to the reduced production temperatures that alter the interaction at the bi-tumen-aggregate interface. The materials response significantly varies depending on WMA technology as well as mixture type. In this sense, this study focused on the evaluation of both open and dense graded mixtures in-cluding RAP and three different WMA additives (organic wax, chemical additive and zeolite). Hot Mix Asphalt (HMA) mixtures were also prepared for comparison purposes. Since raveling (loss of aggregates from the surface layer) is strongly related to the adhesion properties between binder and aggregates, raveling performance were measured by means of Cantabro tests and correlated to the adhesion properties evaluated through Bond Bitumen Strength (BBS) tests. Tests were performed in dry and wet condition in order to assess the water susceptibility. Results showed that the type of WMA technology may influence mixture performance especial-ly when subjected to water conditioning. However, RAP aggregates within both open and dense graded WMA mixtures significantly limited the negative effects of reduced production tem-peratures in terms of adhesion and water resistance. Only the chemical WMA additive guaran-teed performance comparable to HMA, particularly in terms of water susceptibility.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/245773

Hot recycling of reclaimed asphalt using a bio-based additive
RILEM Bookseries
Autore/i: Grilli, Andrea; Bocci, Edoardo; Bocci, Maurizio
Editore: Kluwer Academic Publishers
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Hot recycling of reclaimed asphalt (RA) has increasing interest worldwide due to economical and environmental benefits. In particular, the use of RA in place of virgin aggregates reduces of aggregate supply and disposal of RA. Moreover, the hot recycling process allows reusing the aged bitumen from the RA, implying a reduction of the required amount of new bitumen. However, the ageing process, which occurs from the production throughout the service life of the pavement, affects physical and chemical properties of bitumen, determining its hardening. For this reason, when high amounts of RA has to be reused (more than 20% by aggregate weight), the use of specific additives is strongly recommended in order to reach the desired bitumen properties and consequently to produce an asphalt concrete (AC) with high performance. This experimental project focused on the use of a bio-based additive (A) for the production of an AC for binder course with a high amount of RA. The experimental program consisted of two main phases: the first phase dealt with the mix design of three mixtures containing respectively no RA, 40% of RA, 40% of RA treated with A; the second phase aimed at producing and laying down in a trial section selected mixtures for the validation of the full-scale hot recycling process.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/234932

Effect of curing on the physical and mechanical properties of cold-recycled bituminous mixtures
MATERIALS & DESIGN
Autore/i: Graziani, Andrea; Godenzoni, Carlotta; Cardone, Fabrizio; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Cold recycling of bituminous pavements is an effective way to reduce cost of pavement maintenance. Depending on composition, cold-recycled mixtures with a wide range of mechanical properties can be produced. However, regardless of composition, a distinctive feature of cold-recycled mixtures is the requirement for a curing period to develop the long-term mechanical properties. The main objective of this study was to characterize the curing process of cold-recycled mixtures by analysing the rate at which mixture properties evolve over time and their value in the long-term cured state. The study was focused on two mixtures with a fixed dosage of bituminous emulsion (3.3%) and two cement dosages (1% and 2.5%). Moisture loss by evaporation, ITS and ITSM were measured over time (100 days), considering two curing temperatures (25 °C and 40 °C). The evolution of such properties was modelled using two asymptotic regression models. Results showed that the Michaelis–Menten model effectively describes the evolution of material properties over time, the relation between water loss and mechanical properties and the relation between ITSM and ITS. Cement dosage had an important impact on the long-term values of material properties, whereas curing temperature mainly influenced the rate of curing.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/231142

Tests campaign analysis to evaluate the capability of fragmentation test to characterize recycled asphalt pavement (RAP) material
RILEM Bookseries
Autore/i: Perraton, D; Tebaldi, G.; Dave, E.; Bilodeau, F.; Giacomello, G.; Grilli, Andrea; Graziani, Andrea; Bocci, Maurizio; Grenfell, J.; Muraya, P.; Pasetto, M.; Kuna, K.; Apeagyei, A.; Lo Presti, D.; Airey, G.; Jenkins, K.; Hajj, E.; Hugener, M.; Marsac, P.
Editore: Springer
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Cold and hot recycling of reclaimed asphalt pavement (RAP) is increasingly gaining in popularity worldwide due to the need to increase the sus- tainability of asphalt pavement, both from environmental and economic perspec- tives. Despite the increasing of use of these techniques, we are still faced with the problem of correctly characterizing RAP. In the framework of the RILEM TC 237-SIB TG6, a Round Robin Test (RRT) was performed in order to evaluate the capacity of the fragmentation test to characterize RAP materials. A total of 5 laboratories located in 4 different countries were involved in the testing program. This paper focuses on the presentation of the fragmentation test method and the results of the RRT performed on different sources of RAP. To differentiate RAP materials in terms of size alteration vulnerability, fragmentation tests were per- formed at three different temperatures (5, 20 and 40 °C) on different sources of RAP. Fragmentation testing consists in evaluating the amount of materials passing through a control sieve of a coarse uniform RAP material after a fixed series of strokes carried out with a normalized falling mass. Results show that fragmentation is reduced when the testing temperature increases. Fragmentation tests performed on natural aggregates indicate that they do not vary with the testing temperature, and such test results are a function of the amount of foreign matter in the RAP. The results also show that the test is suitable for differentiating RAP materials from different sources.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/231120

Durability of NO Oxidation Effectiveness of Pavement Surfaces Treated with Photocatalytic Titanium Dioxide
THE ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING. SECTION B, ENGINEERING
Autore/i: Bocci, Edoardo; Riderelli, Luca; Fava, Gabriele; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Nowadays, photocatalysis has demonstrated to be a reliable solution in order to purify the atmosphere from the pollutants originated by vehicular traffic. Owing to the primary importance of this problem, the potential of innovative photocatalytic techniques, dealing with the immobilization of Titanium Dioxide TiO2 on the surface of the asphalt pavement, has been investigated. In particular, three different products, two bituminous emulsions and a cement mortar, were applied on the right lane and on the emergency lane of a Highway section in Italy. The effectiveness of the photocatalytic treatments and its evolution with time were evaluated on cores taken after 1, 17, 46, 88, 218 and 527 days from the application of the products. Two tests were carried out on the cores: the NO degradation was evaluated through continuous flow tests and the size of the treated areas was quantified by means of digital image analysis methods. The research showed interesting results, as all the techniques, in particular the bituminous emulsion based products, proved to have a good effectiveness in air depolluting, even if a decay of performance was noted, depending of traffic and weather conditions.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246621

Performance Evaluation of Asphalt Concrete Modified by Polyolefins Through Dry and Wet Process
PROCEDIA ENGINEERING
Autore/i: Cardone, Fabrizio; Frigio, Francesca; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Polymer modification in road paving applications enables significant improvement in road service life as regards main distresses such as rutting, fatigue and thermal cracking. Polymer modification can be performed through a dry or wet process, and it may lead to mixtures with different mechanical properties depending on the modification process employed. In this context, this paper presents a laboratory investigation concerning the effect of a polyolefinic additive (PO) on the mechanical response of asphalt concrete produced by dry and wet process. Mechanical characterization consisted of wheel tracking tests at 40 and 60 °C for rutting resistance analysis and semi-circular bending tests at 10 °C for cracking behaviour analysis. Results showed higher rutting resistance of PO modified asphalt concretes (AC) compared to the control mixtures, but they were found to be more temperature sensitive denoting a penalized rutting response at higher temperature. PO modified ACs also showed higher fracture toughness and reduced fracture energy. In particular, the dry process seems to guarantee an ability of deformation such as better endurance of cracking propagation with respect to the mixture produced by the wet process.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/240457

IL CATALOGO DELLE PAVIMENTAZIONI DELL’ALTO ADIGE
STRADE & AUTOSTRADE
Autore/i: Volkmar, Mair; Philipp, Sicher; Günther, Kiem; Sergio, Finozzi; Roland, Vitaliani; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Il problema del dimensionamento delle pavimentazioni stradali: la provincia autonoma di Bolzano ha ritenuto opportuno dotarsi di un catalogo delle pavimentazioni, studiato per le condizioni climatiche, ambientali e di traffico specifiche delle varie tipologie di strade della propria rete.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/234934

Volumetric properties and influence of water content on the compactability of cold recycled mixtures
MATERIALS AND STRUCTURES
Autore/i: Grilli, Andrea; Graziani, Andrea; Bocci, Edoardo; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Volumetric characteristics significantly influence the mechanical performance and the durability of bituminous mixtures. Indeed, they are important parameters to be considered in both mix design and quality control phases. Nowadays, among compaction methods, the gyratory compactor (GC) is worldwide used for bituminous mixtures. Even if there is not a universally accepted compaction procedure for cold recycling, numerous universities and road administration agencies have employed the GC especially for bituminous emulsion treated materials. However, the presence of recycled aggregate, cement, bituminous emulsion and water requires adapting the traditional volumetric parameters to these recycled materials. This paper describes the volumetric characteristics of cold recycled mixtures based on the traditional principles used for hot bituminous mixtures. In particular, the compactability and the influence of water content on a mixture containing 50 % of reclaimed asphalt stabilized with 3 % of emulsion and 2 % of cement were investigated. Moreover, closed and slotted moulds were used to study in depth the saturation process. Results showed that specimens compacted in a closed mould, at high water contents, have a bi-linear evolution of the voids content, which defines two compaction phases. In addition, laboratory compaction using a closed mould seems to simulate better the full-scale compaction procedure. Finally, the water content that allowed the saturation state to be reached at the end of the compaction process corresponded to the optimum water content of the mixture.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/233432

The effect of curing on the mechanical behavior of cement-bitumen treated materials
RILEM Bookseries - 8th International RILEM Symposium on Testing and Characterization of Sustainable & Innovative Bituminous Materials
Autore/i: Godenzoni, Carlotta; Cardone, Fabrizio; Graziani, Andrea; Bocci, Maurizio
Editore: Springer Science + Business Media
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The re-use of pavement materials is an efficient and cost-effective solution in road rehabilitation and construction activities, especially when the availability of high-quality virgin aggregates is limited. In this context, cold recycling of bituminous pavements is becoming one the of most attractive and low environmental impact techniques. The use of cold-recycled pavement mixtures requires a careful assessment of their mechanical properties, which are influenced by both compositional and environmental factors. In particular, regardless of aggregate nature, binder type and dosage, a distinctive feature of cold recycled mixtures is the requirement for a certain curing period to develop the ultimate values of strength and stiffness. In this study, the mechanical behaviour of cement-bitumen treated materials (CBTM), containing high percentage of reclaimed asphalt (RA), was evaluated considering the influence of curing time and temperature. Two CBTM containing 1.0 and 2.5 % cement and 2.0 % of fresh bituminous binder were analyzed. Cylindrical specimens were compacted using a gyratory compactor and cured at 25 and 40 °C; moisture loss and indirect tensile strength (ITS) were measured at increasing curing times. Results showed that the curing temperature and time (curing conditions) significantly affect the moisture loss by evaporation that therefore can be considered a good estimator of the curing process. Moreover, the mechanical characterization indicated that the moisture loss and the cement content control the increase in strength properties of the investigated CBTM. Results also showed that the cement content strongly affects the moisture loss in addition to assure improved mechanical behavior.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/228647

Influence of reclaimed asphalt content on the complex modulus of cement bitumen treated materials
Bituminous Mixtures & Pavements VI
Autore/i: Godenzoni, Carlotta; Graziani, Andrea; Bocci, Maurizio
Editore: Taylor & Francis Group, London,
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The objective of this study was to characterize the volumetric and stiffness properties of cold- recycled mixtures treated with bituminous emulsion and cement, produced using different reclaimed asphalt percentages (50%, 80% and 0%). In the first part of the experimental program, volumetric properties and compactability were analyzed using a gyratory compactor. In the second part, the complex modulus was measured by means of cyclic compression tests, on cylindrical specimens. A conventional frequency sweep procedure was followed in a range of service temperatures. The strain level was chosen focusing the attention on the linear domain. The experimental results showed that complex modulus was influenced by frequency and temperature similar to hot mix asphalt. In addition, the time-temperature superposition principle was verified only for the absolute value of the complex modulus but not for its phase angle. Results also showed the influence of bituminous and hydraulic mortars on the rheological response.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/228668

Curing and temperature sensitivity of cement–bitumen treated materials
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
Autore/i: Cardone, Fabrizio; Grilli, A.; Bocci, Maurizio; Graziani, Andrea
Classificazione: 1 Contributo su Rivista
Abstract: In the present study, the curing process of cement–bitumen treated materials (CBTM) was investigated by analysing the influence of cement dosage and curing temperature on moisture loss and evolution of complex modulus. Moreover, the study aimed to characterise the thermo-rheological behaviour of cured CBTM. Results showed that moisture loss by evaporation controls the increase in stiffness of the mixtures. However, excessive evaporation can hinder the full potential of the cement hydration process. Results also showed that the quantitative effects of curing time and loading frequency on stiffness can be superposed. Similar to hot-mix asphalt, CBTM showed a viscoelastic and thermo-dependent response. In particular, results suggested that at higher frequencies, the iso-thermal viscoelastic response is mainly affected by the aged binder whereas, at lower frequencies, the response of the mixtures depended mainly on the behaviour of the fresh binder
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/201504

Complex Poisson’s ratio of bituminous mixtures: measurement and modeling
MATERIALS AND STRUCTURES
Autore/i: Graziani, Andrea; Bocci, Maurizio; Canestrari, Francesco
Classificazione: 1 Contributo su Rivista
Abstract: Mechanical characterization of bituminous mixtures in the linear viscoelastic (LVE) domain is commonly limited to the measurement of a single (mono--dimensional) material function, either the Young's modulus or the shear modulus. Even under the additional hypothesis of isotropy, a complete (three-dimensional) description of the LVE response requires two material functions to be determined simultaneously and in the same experimental conditions. The measurement of viscoelastic Poisson's ratio, though generally overlooked because of the high accuracy and precision required, offers the opportunity to put aside this limitation because it can be achieved in experimental conditions that are very similar to those employed to obtain the Young's modulus. In the present experimental research the concurrent determination of the complex Poisson's ratio and the complex Young's modulus of a bituminous mixture is presented. A rheological model is employed to fit the measured complex-valued material functions and the validity of the time-temperature superposition principle is investigated. The experimental program consists of cyclic compression tests performed on cylindrical samples, with the measurement of axial and transverse strains. A conventional frequency sweep procedure is followed in a range of intermediate service temperatures. Two strain levels are chosen focusing the attention on the linear domain. In addition, samples with different air voids content are tested to observe the effect of the aggregate skeleton. Results allowed to characterize frequency and temperature dependance of the complex Poisson's ratio and make a comparison to that of the complex Young's modulus on the basis of the selected rheological model. Experimental data confirm the validity of the time--temperature superposition principle but suggest that different shift factors may be required to correctly translate the time--temperature dependance of different material functions.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/112464

Clear asphalt concrete for energy saving in road tunnels
Asphalt Pavements
Autore/i: Bocci, E.; Bocci, Maurizio
Editore: CRC PRESS - Taylor & Francis Group
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Nowadays the interest in clear pavements for road tunnel applications is rapidly increasing, as their high photometric properties assure an important reduction of power consumption for electric lighting and an improvement of safety conditions. One of the solutions for manufacturing clear pavements consists in mixing light-colored mineral aggregates with particular transparent asphalt binders. This production technique was used in 2012 to manufacture the clear asphalt concrete for wearing courses of two road tunnels in the north of Italy. The present paper deals with the mix design and the evaluation of mechanical and photometric properties of the clear asphalt concrete used for paving these tunnels. In particular, tests were carried out on the raw materials and on both lab-manufactured and plant-manufactured mixes. At the end of the tests clear mixtures showed good mechanical properties, similar to a traditional “black” asphalt concrete in terms of indirect tensile strength and indirect tensile stiffness modulus. In addition clear mixtures showed very high photometric properties after five months from the opening to traffic.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/195904

Full-depth reclamation for the rehabilitation of local roads: a case study
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
Autore/i: Bocci, Maurizio; Grilli, A.; Cardone, Fabrizio; Ferrotti, Gilda
Classificazione: 1 Contributo su Rivista
Abstract: Full-depth reclamation (FDR) techniques for pavement construction and rehabilitation have gained general recognition because of their technical, economical and environmental advantages. The use of cement–bitumen-treated material (CBTM) has rapidly increased over the last 10 years mainly in motorways. Public administrations have recognised the advantages of FDR, and this technique has also begun to be applied for the rehabilitation of local and/or rural roads. This paper shows the results from a trial section built to verify the suitability of FDR for the rehabilitation of local roads. The design planned the in situ stabilisation with styrene-butadiene-styrene (SBS)-modified bituminous emulsion and cement of hot mix asphalt and foundation course. The mechanical characteristics of CBTM were evaluated by means of stiffness modulus tests at different temperatures and fatigue tests. The obtained results offer good prospects for the application of FDR in the maintenance project of local roads.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/149302

Laboratory characterisation of optimised geocomposites for asphalt pavement reinforcement
GEOSYNTHETICS INTERNATIONAL
Autore/i: Pasquini, Emiliano; Bocci, Maurizio; Canestrari, Francesco
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/175107

Synthesis of standards and procedures for specimen preparation and in-field evaluation of cold-recycled asphalt mixtures
ROAD MATERIALS AND PAVEMENT DESIGN
Autore/i: Gabriele, Tebaldi; Eshan V., Dave; Paul, Marsac; Patrick, Muraya; Martin, Hugener; Marco, Pasetto; Graziani, Andrea; Andrea, Grilli; Bocci, Maurizio; Alessandro, Marradi; Louisette, Wendling; Vincent, Gaudefroy; Kim, Jenkins; Andreas, Loizos; Canestrari, Francesco
Classificazione: 1 Contributo su Rivista
Abstract: The use of recycled asphalt (RA) materials in pavement rehabilitation processes is continuously increasing as recycling techniques, such as cold recycling (CR), are being utilised in increasing magnitude and greater awareness for use of recycled materials and consideration of sustainable practices is becoming common in the construction industry. The focus of this paper is on developing a state of the art and state of the practice summary of processes used for classification of RA as well as the curing and specimen preparation practices for cold-recycled asphalt mixtures. A variety of topics were explored through an exhaustive literature search, these include RA production methods, definition of RA materials, stockpiling practices, industrial operations, specimen curing and preparation practices and in-field evaluation of cold-recycled rehabilitation. This paper was developed through efforts of CR task group (TG6) of RILEM Technical Committee on Testing and Characterization of Sustainable Innovative Bituminous Materials and Systems (TC-237 SIB).
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/150304

Experimental investigation of the dynamic behaviour of asphalt concrete treated with photocatalytic mortars
Sustainability, Eco-efficiency and Conservation in Transportation Infrastructure Asset Management
Autore/i: Bocci, Maurizio; Cerni, G.; Colagrande, S.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The increase of environmental atmospheric pollution can be dealt with various methodologies, including the use of environmentally friendly materials based on photocatalytic reactions. Therefore, in the field of road construction, asphalt concrete pavements could be combined with a superficial layer of cement mortar containing photocatalytic substances in order to directly subject them to pollutants coming from vehicular traffic exploiting the wide surface area of road pavements in contact with the atmosphere. The aim of this study is to analyze the mechanical characteristics of the heterogeneous system asphalt concrete – photo-catalytic mortar in order to identify its actual behaviour and compare it with that of sole asphalt concrete. Modulus and fatigue dynamic tests have been carried out on specimens taken from porous asphalt concrete manufactured slabs over which photocatalytic mortars, prepared with different percentages of water, had pre-viously been poured. Investigations proved that the percentage of water used in the photocatalytic mortars af-fects the mixture fluidity, which influences both the level of penetration of the mortar through pores and the mechanical performances of road pavement.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/160915

Tappeti chiari sotto la volta
LE STRADE
Autore/i: Bocci, Maurizio; Mair, V.
Classificazione: 1 Contributo su Rivista
Abstract: La provincia di Bolzano, nell’ambito del programma Interreg IV e con la collaborazione dell’Università Politecnica delle Marche, ha portato a termine l’applicazione in due gallerie della rete stradale provinciale di un manto di usura - realizzato con aggregati chiari e legante trasparente - sviluppato con l’obiettivo di ridurre i consumi di energia per l’illuminazione e migliorare la sicurezza. Di seguito, tutti i dettagli su studio della miscela ottimale, lavorazioni e controlli post‑operam.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/161502

Experimental investigation on fiber-reinforced cement-treated mixtures using reclaimed asphalt
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Grilli, A.; Bocci, Maurizio; Tarantino, A. M.
Classificazione: 1 Contributo su Rivista
Abstract: Cement treated materials (CTMs) are used as base or subbase courses for heavy-traffic highway. CTMs are characterised by high strength and stiffness ensuring a good support for the upper bituminous layers and by a uniform stress distribution on the lower layers. However, high stiffness of CTM can be self-defeating when the brittle behaviour becomes critical. In this case, CTM become typically prone to shrinkage cracking, which can lead to premature failure of the overall pavement. The use of polymer fibres, such as polypropylene fibres (PFs), can avoid the CTM weakening due to shrinkage phenomenon and it can prevent crack propagation with remarkable benefits in terms of service life of the road pavement. CTM were originally produced using natural or crushed aggregates but, currently, also recycled aggregates, such as reclaimed asphalt (RA), have been more and more used to preserve natural resources and to reduce the disposal of materials coming from the demolition of civil constructions. Although recycled aggregates could affect CTM mechanical characteristics, an accurate mix design and material selection allow appreciable performance to be reached. This paper is a part of an overall research project and it investigates the influence of PF dosage and RA content on CTM properties. In particular, 3-point bending tests and ultrasonic pulse velocity tests were carried out on CTM employing a combination of different PF dosages and RA contents.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/164719

Laboratory and In-Plant Validation of Hot Mix Recycling Using a Rejuvenator
INTERNATIONAL JOURNAL OF PAVEMENT RESEARCH AND TECHNOLOGY
Autore/i: Grilli, A.; Bocci, Maurizio; Cardone, Fabrizio; Conti, Carla; Giorgini, Elisabetta
Classificazione: 1 Contributo su Rivista
Abstract: This paper shows an experimental investigation developed in laboratory and in mix-plant for the validation of an asphalt concrete (AC) produced through the hot mix recycling (HMR) technique. A specific rejuvenator was used to improve the mechanical characteristics of the AC containing reclaimed asphalt (RA). The optimum dosage of the rejuvenator was selected on the basis of the viscosity of the bitumen recovered from RA. The AC produced with the optimum dosage of rejuvenator and 30% of RA was characterized in laboratory by means of indirect tensile strength (ITS) and indirect tensile stiffness modulus (ITSM). The results obtained in laboratory were validated by testing the AC produced in a mix-plant. The Fourier transform infrared spectrometry (FT-IR) was used to evaluate the interaction between rejuvenator and bitumen and to check the presence of the rejuvenator to produce the AC in the mix-plant.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/125064

Laboratory characterisation and field validation of geogrid-reinforced asphalt pavements
ROAD MATERIALS AND PAVEMENT DESIGN
Autore/i: Pasquini, Emiliano; Bocci, Maurizio; Ferrotti, Gilda; Canestrari, Francesco
Classificazione: 1 Contributo su Rivista
Abstract: In order to improve the mechanical properties of pavements, reinforcement systems can be employed in asphalt layers. However, the presence of a grid at the interface causes an interlayer de-bonding effect. Moreover, a real challenge is related to the proper in situ installation of grids. The present research aims to evaluate the effectiveness of pavement rehabilitation with fibreglass geogrids. To this purpose, a real-scale field trial was constructed and monitored through Falling Weight Deflectometer measurements. Interface shear tests and flexural tests were also carried out on double-layered samples prepared in the laboratory reproducing realscale field trial characteristics. Moreover, shear tests were also performed on in situ cored specimens. Results mainly showed that a proper installation of the reinforcement is fundamental in order to obtain suitable test results and good pavement performance.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/82572

Runway pavement reconstruction with full material recycling: The case of the Airport of Treviso
ADVANCED MATERIALS RESEARCH
Autore/i: Bocci, Maurizio; Manganaro, A.; Stramazzo, V.; Grilli, A.
Classificazione: 1 Contributo su Rivista
Abstract: This technical paper shows the innovative approach used in the rehabilitation of the runway of the airport of Treviso. Treviso is located in North Italy and lies about 40 km far from Venice. For this reason, the airport of Treviso may be considered the second airport of Venice and receives the low-cost companies. In order to minimize the environmental impact of the rehabilitation project, the materials coming from the demolition of the old runway pavement were completely recycled in the new runway pavement. Several recycling techniques were used such as the cement stabilization of soil, cement treatment of milled cement concrete and cement-bitumen treatment of reclaimed asphalt. This paper shows the technical application of scientific knowledge on pavement recycling developed in Italy in the last decade.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/164716

Classification of recycled asphalt (RA) material
2nd International symposium on asphalt pavements & environment, ISAP TC APE, Fortaleza, Brazil, October 1–3 2012.
Autore/i: Tebaldi, G.; Dave, E.; Marsac, P.; Muraya, P.; Hugener, M.; Pasetto, M.; Graziani, Andrea; Grilli, A.; Marradi, A.; Wendling, L.; Gaudefroy, V.; Jenkins, K.; Loizos, A.; Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/82839

Synthesis of Specimen Preparation and Curing Processes for Cold Recycled Asphalt Mixes
2nd International symposium on asphalt pavements & environment, ISAP TC APE, Fortaleza, Brazil, October 1–3 2012.
Autore/i: Tebaldi, G.; Dave, E.; Marsac, P.; Muraya, P.; Hugener, M.; Pasetto, M.; Graziani, Andrea; Grilli, A.; Marradi, A.; Wendling, L.; Gaudefroy, V.; Jenkins, K.; Loizos, A.; Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The process of cold recycling (CR) is becoming method of choice for pavement rehabilitation due to significantly added environmental and economic benefits. Understanding and standardization of specimen preparation and curing processes are critical to replicate field conditions in lab. This paper presents an extensive synthesis of various specimen preparation and curing processes for cold recycled asphalt mixes. Topics synthesized include RAP, emulsion/bitumen and aggregate preparation, mixing processes, pre- and post- compaction curing, compaction and mechanical testing. This paper was developed through efforts of cold recycling task group (TG6) of RILEM Technical Committee on Testing and Characterization of Sustainable Innovative Bituminous Materials and Systems (TC-SIB).
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/82841

Permanent deformation behaviour of unbound recycled mixture
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Cerni, G.; Cardone, Fabrizio; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Nowadays, the use of recycled waste materials in road construction and rehabilitation processes aimed to preserve non-renewable resources and to solve management problems related to the expansion of landfills become a promising engineering solution. The current paper deals with the feasibility of using material from construction and demolition wastes (C&D) as aggregate for unbound layers (base and/or subbase) of road pavements. In particular, the permanent deformation behaviour of a recycled C&D mixture under repeated triaxial loading was investigated and compared with that of two natural granular mixtures selected as reference materials. An analytical model, proposed by the authors, was used to describe the long-term permanent strain accumulation of materials. The results, in addition to showing the ability of the model to predict change in mechanical behaviour depending on the different nature of materials, highlight how the C&D mixture performs better under specific stress and moisture conditions compared with traditional materials. Finally, the results obtained in this study not only provide a practical approach for ranking granular materials for pavement with regard to their rutting potential but also promote the use of C&D materials as a sustainable and effective alternative to traditional aggregates.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/82310

Compactability and Thermal Sensitivity of Cement-Bitumen Treated Materials
ROAD MATERIALS AND PAVEMENT DESIGN
Autore/i: Grilli, A.; Graziani, Andrea; Bocci, Maurizio
Classificazione: 1 Contributo su Rivista
Abstract: Full depth reclamation is one of the most used rehabilitation methods for subbase courses in high-traffic roads. The use of both cement and bituminous binder as binding agents for reclaimed pavement materials can lead to mixtures having high bearing capacity and resistance to permanent deformation, avoiding premature cracking due to shrinkage. This paper focuses on two main topics: compactability and thermal sensitivity of cement- bitumen treated materials (CBTM). Liquid dosage in CBTM is a key parameter in order to obtain an effective compaction. The volumetric characteristics and the optimum liquid content of CBTM were studied by means of two compaction methods: Proctor and shear gyratory compactor. The temperature susceptibility of CBTM can be a valuable factor in both design and construction quality control. The influence of temperature on the stiffness modulus of CBTM was investigated using two testing methods: indirect tensile stiffness modulus (ITSM) and ultrasonic pulse velocity (UPV). While ITSM provided reference modulus values at strain levels and rates typical of traffic loads, UPV was used to estimate the Young modulus at very low strain levels and high frequencies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/81958

Clear Asphalt Mixture for Wearing Course in Tunnels: Experimental Application in the Province of Bolzano
PROCEDIA: SOCIAL & BEHAVIORAL SCIENCES
Autore/i: Bocci, Maurizio; Grilli, A.; Cardone, Fabrizio; Virgili, Amedeo
Classificazione: 1 Contributo su Rivista
Abstract: A new technical and political awareness on safety driving and reduction of environmental impact have increased the use of coloured asphalt pavements in road construction. A clear asphalt mixture (CAM) for wearing courses, designed and laid down during the rehabilitation of an Italian tunnel, was subjected to the acceptance inspection, mechanical characterization and determination of photometric properties. Traditional and performance-based tests were carried out to determine the failure resistance, compactability, stiffness, abrasion resistance and water sensitivity of the CAM. Luminance and reflection properties of CAM were measured and compared with those of HMA in order to assess possible lighting benefits.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/82372

Recycling the top layers of road pavement
International Brenner Congress VIATEC
Autore/i: Bocci, Maurizio; Grilli, A.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/72159

A study on the mechanical behaviour of cement–bitumen treated materials
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Bocci, Maurizio; Grilli, A.; Cardone, Fabrizio; Graziani, Andrea
Classificazione: 1 Contributo su Rivista
Abstract: Full depth reclamation (FDR) of asphalt pavements has gained general appreciation because of its technical, economical and environmental advantages. Along with FDR, the use of cement–bitumen treated materials (CBTM) rapidly increased over the last 10 years even if the lack of well-established technical specifications and reliable in situ control procedures hinder the cost-effective use of this material. Spec- ifications for CBTM are currently based on experience and do not consider all the relevant parameters that affect the mixture behaviour. In this study the influence of curing conditions, temperature and moisture on the mechanical behaviour of CBTM is investigated. The recycled material was sampled during the FDR operations carried out on the Italian A14 motorway. The effect of curing and temperature on stiffness, and resistance to repeated loading were evaluated using cyclic indirect tensile tests. Moisture susceptibility was assessed by means of indirect tensile strength tests. Results showed a temperature-dependent behaviour of CBTM and allowed to define a simple model to predict the stiffness modulus based on curing time and temperature. In addition, the resistance to repeated loading proved to be a sig- nificant factor for the mechanical characterization of tested materials. Finally, regardless of curing conditions, the mixtures showed good moisture resistance.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/39863

IL RICICLAGGIO A FREDDO SULLA VIABILITA' PROVINCIALE DI ANCONA
STRADE & AUTOSTRADE
Autore/i: Bocci, Maurizio; Grilli, A.
Classificazione: 1 Contributo su Rivista
Abstract: IN PRESS
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/29010

Pavimentazioni Rinforzate - Progetto Pilota nella Provincia Autonoma di Bolzano
STRADE & AUTOSTRADE
Autore/i: Bocci, Maurizio; Canestrari, Francesco; Ferrotti, Gilda; Pasquini, Emiliano
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/54829

Recycling Techniques and Environmental Issues relating to the Widening of an High Traffic Volume Italian Motorway
INTERNATIONAL JOURNAL OF PAVEMENT RESEARCH AND TECHNOLOGY
Autore/i: Bocci, Maurizio; Canestrari, Francesco; Grilli, Andrea; Pasquini, Emiliano; Lioi, D.
Classificazione: 1 Contributo su Rivista
Abstract: On the last few decades, the use of recycled materials has become important because of the limited availability of good aggregates and the difficulties and excessive disposal costs for milled materials. This study provides an environmental evaluation of a specific rehabilitation project involving several recycling techniques on one of the main Italian motorways. Three rehabilitation options are evaluated and compared in terms of their environmental impact, with particular emphasis on the construction of the subbase course. In the end, the definitive design involved different recycling techniques, including cold in-place recycling (CIPR) with bituminous emulsion and cement for the subbase layer, stabilization of the soil with lime for the embankment, the use of reclaimed asphalt in the production of hot mix asphalt, and the use of crushed cement concrete for the cement treated layers. All of these recycling methods allow the saving of the virgin aggregates, and a reduction in materials transportation and pollutant emissions coming from both the production plant and the means of transport.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/30753

L'impiego di conglomerato bituminoso di recupero nelle miscele stabilizzate a cemento
STRADE & AUTOSTRADE
Autore/i: Bocci, Maurizio; A., Grilli; Graziani, Andrea
Editore: EDI-CEM, Milano
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/39864

MECHANICAL CHARACTERIZATION AND INFLUENCE OF WATER ON WMA BY ADDING SYNTHETIC ZEOLITE
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING & ASPHALT TECHNOLOGY
Autore/i: Bocci, Maurizio; A., Grilli; V., Pannunzio; P. P., Riviera
Classificazione: 1 Contributo su Rivista
Abstract: ABSTRACT: The Warm Mix Asphalt (WMA) can be produced through different techniques, including the use of asphalt emulsion, waxes and paraffins, two binder components (soft and hard) and synthetic zeolite. Synthetic zeolite is principally composed of a siliceous structure with large and interconnected spaces, which can accommodate molecules of water. Synthetic zeolite can hold water in its structure at low temperatures and drive it out after heating. From a technical point of view, at mixing temperature, synthetic zeolite gradually releases a small amount of water and, as a consequence of water vapor emission, generates a foaming effect in the bitumen. This process allows to increase the workability of the asphalt mixture or lower mixing and laying temperatures. However, the released water could affect the adhesion between aggregates and bitumen or the cohesion of the mastic.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/29008

Rehabilitation of an Italian Highway by Cold In-Place Recycling Techniques
Advanced Testing and Characterization of Bituminous Materials
Autore/i: Bocci, Maurizio; A., Grilli; Cardone, Fabrizio; Santagata, Felice Ausilio
Editore: CRC PRESS - Taylor & Francis Group
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: ABSTRACT: In Cold In-Place Recycling (CIR), emulsion and foamed bitumen have currently used as the most common binders. However, there is a need to better understand the mechanical performance of these stabilized mixtures. This paper shows the results obtained from two trial sections in order to optimize the rehabilitation process of an Italian highway through CIR techniques for a subbase layer. The trial sections were built through two different stabilization techniques: cement-foamed bitumen and cement-emulsion treatment. Both applications considered recycled mixtures of 50% Reclaimed Asphalt Pavement (RAP) and 50% cementitious and granular milled materials, combining different contents of cement and bituminous binder. The experimental program provided the mechanical characterization in laboratory and in-situ. The result analysis allowed to evaluate and compare mechanical performance of stabilized-recycled materials and to highlight the practical application of the two stabilization techniques.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/53625

Valutazione sperimentale dell’efficacia disinquinante di pavimentazioni fotocatalitiche
LE STRADE
Autore/i: Santagata, Felice Ausilio; Bocci, Maurizio; Canestrari, Francesco; Pasquini, Emiliano
Classificazione: 1 Contributo su Rivista
Abstract: I LIVELLI DI INQUINAMENTO ATMOSFERICO NELLE AREE URBANE HANNO STIMOLATO LA RICERCA DI NUOVE TECNOLOGIE CAPACI DI MITIGARE LA CONCENTRAZIONE DI SOSTANZE NOCIVE LUNGO LE ARTERIE STRADALI, ALLO SCOPO DI RENDERE LE CITTÀ PIÙ VIVIBILI. A TALE PROPOSITO ESISTONO ALCUNI MATERIALI A BASE DI BIOSSIDO DI TITANIO (TiO2), FACILMENTE APPLICABILI SU DIVERSE SUPERFICI, CHE IN PRESENZA DI LUCE ED ARIA SONO CAPACI DI TRASFORMARE LE SOSTANZE INQUINANTI PRESENTI IN ATMOSFERA IN COMPOSTI INNOCUI PER EFFETTO DI UN PROCESSO DI FOTOCATALISI. GLI AUTORI HANNO INSERITO LO STUDIO DI DUE PRODOTTI A BASE DI TiO2 ALL’INTERNO DI UN PROGETTO PILOTA NAZIONALE RIGUARDANTE MATERIALI STRADALI INNOVATIVI ECOSOSTENIBILI. IL PROGETTO HA PREVISTO LA REALIZZAZIONE DI UNA STESA SPERIMENTALE IN UN TRATTO DI STRADA STATALE URBANA AD ELEVATO TRAFFICO ALLO SCOPO DI VALUTARE IN SITO, MEDIANTE CENTRALINE AMBIENTALI, ED IN LABORATORIO, SULLA BASE DI PROTOCOLLI DI PROVA ORIGINALI, LE PROPRIETÀ DISINQUINANTI DEI TRATTAMENTI OGGETTO DI STUDIO.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/31458

Il riciclaggio a freddo per l’ampliamento alla terza corsia dell’autostrada A14
STRADE & AUTOSTRADE
Autore/i: Bocci, Maurizio; A., Grilli; P. P., Riviera; F., Tolentino; S., Paglione
Editore: EDI-CEM, Milano
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/28787

Mechanical characterization of environmentally friendly mixtures
Advanced Characterisation of Pavement and Soil Engineering Materials
Autore/i: Bocci, Maurizio; Canestrari, Francesco; Ferrotti, Gilda; Pasquini, Emiliano
Editore: A. Loizos, T. Scarpas, I: Al-Qadi
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Nowadays, road traffic is the main cause of urban pollution. Owing to the primary importance of this problem two different environmentally friendly mixtures were considered: the first to reduce traffic noise and the second to mitigate atmospheric pollution. The anti-noise mixture is a dense-graded HMA in which 27% volume of mineral aggregates was replaced with expanded clay. The second mixture, which should mitigate air pollution, is an open-graded asphalt concrete partially filled with a cement mortar containing a photocatalytic agent (titanium dioxide). In order to properly use these mixes for road applications the evaluation of specific mechanical performance is required. In particular, the Authors show the laboratory characterization of the mixtures in terms of stiffness modulus, fatigue life and rutting comparing them with dense-graded and open-graded wearing courses, respectively.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/53843

Experimental analysis of the potentialities and limits of asphalt mixtures by adding zeolite
4° International SIIV congress
Autore/i: Bocci, Maurizio; Virgili, Amedeo; A., Grilli; V., Pannunzio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/53220

Influence of reinforcement geosynthetics on flexion behaviour of double-layer bituminous systems
Proceedings, International Conference: Advanced Characterization of Pavement and Soil Engineering Materials
Autore/i: Bocci, Maurizio; A., Grilli; Santagata, Felice Ausilio; Virgili, Amedeo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: ABSTRACT: High performance materials, like geosynthetics, have to be analysed in order to determine whether these products act as reinforcement and enable longer pavement durability. A new research project on fatigue investigations of reinforced asphalt pavement is in progress at the Università Politecnica delle Marche (Italy) and the results presented in this paper are part of the overall experimental program. In particular, the purpose of the present work is to compare three reinforcement systems and to understand the corresponding fatigue behaviour under controlled deflection and controlled load modes. To this end, double layered prismatic specimens have been used to perform four point bending fatigue tests. Test results have been elaborated considering the following approaches: − dissipated energy for controlled deflection mode; − number of cycles of applied load to failure for controlled load mode. Both test methods have shown improved fatigue life for reinforced systems compared with the unreinforced one.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/53487

Rheological Characterization of Asphalt Binders Fatigue Resistance
10TH INTERNATIONAL CONFERENCE ON ASPHALT PAVEMENTS
Autore/i: Bocci, Maurizio; G., Cerni; E., Santagata; Cardone, Fabrizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Fatigue cracking of bituminous layers is the most common mode of failure for flexible pavements. This distress is mainly related to the rheological properties of asphalt binders. The purpose of this work is to investigate the fatigue behaviour of asphalt binders using cyclic shear tests. Tests are carried out both in the stress and strain controlled mode, using a dynamic shear rheometer (DSR). The study focuses on the evaluation of different binders, and also considers the influence of temperature. Results show that the complex modulus and its fundamental components are useful parameters to understand the damage evolution in the material. Data elaboration allows fatigue characterization by means of conventional fatigue curves based on stiffness loss and dissipated energy. Through the analysis of these curves it is also possible to show and quantify the increasing fatigue resistance due to the addition of polymers in the binder.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/53542

TECNICHE E MATERIALI DI RICICLO PER LA BONIFICA DELLE FONDAZIONI STRADALI
Congresso Internazionale VIATEC
Autore/i: Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44613

Analisi del degrado di conglomerati bituminosi sottoposti a prova di fatica a trazione diretta
Atti del 16° Convegno Nazionale SIIV “Manutenzione ed adeguamento delle strade esistenti”
Autore/i: Cardone, Fabrizio; Bocci, Maurizio; Cerni, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/47966

Valutazione dell’efficacia di un additivo antiossidante per la riduzione dei fenomeni di invecchiamento a lungo termine dei conglomerati bituminosi
16° CONGRESSO NAZIONALE SIIV
Autore/i: Bocci, Maurizio; Cardone, Fabrizio; G., Cerni; A., Grilli
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/51649

THE USE OF FOAMED BITUMEN IN THE COLD RECYCLING OF ROAD PAVEMENTS
5TH INTERNATIONAL CONGRESS VALORISATION AND RECYCLING OF INDUSTRIAL WASTE
Autore/i: Bocci, Maurizio; Cerni, G.; Colagrande, S.; Virgili, Amedeo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44611

Performance analysis of mixtures produced using foamed bitumen
3rd SIIV International Conference
Autore/i: Bocci, Maurizio; Cardone, Fabrizio; G., Cerni; Virgili, Amedeo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/53815

L’impiego del Bitume Schiumato nel Riciclaggio a Freddo delle Pavimentazioni Stradali
VARIREI 2005 V° International Congress on Valorisation and Recycling of Industrial Waste, L'Aquila (Italy)
Autore/i: Bocci, Maurizio; G., Cerni; S., Colagrande; Virgili, Amedeo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44240

UTILIZZO DEL FRESATO NEI CONGLOMERATI BITUMINOSI AD ALTO MODULO
Congresso Internazionale VIATEC
Autore/i: Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/52520

LA SIGILLATURA A FREDDO DEL GIUNTO LONGITUDINALE DI STESA DI TAPPETI DI USURA DRENANTI
STRADE & AUTOSTRADE
Autore/i: Bocci, Maurizio; Tattolo, S.
Editore: EDI-CEM, Milano
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/28786

A study on the mechanical characteristics of cold recycled bituminous concretes
4th European Symposium on "Performance of Bituminous and Hydraulic Materials in Pavements", Nottingham (U.K.), April 11÷12, 2002
Autore/i: Bocci, Maurizio; Virgili, Amedeo; S., Colagrande
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/70905

CARATTERIZZAZIONE REOLOGICA DEI LEGANTI NEI CONGLOMERATI BITUMINOSI RICICLATI A CALDO
CONVEGNO NAZIONALE SIIV, PARMA
Autore/i: Bocci, Maurizio; Tattolo, S.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: CONVEGNO NAZIONALE SIIV, PARMA
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44560

Impiego dei materiali di riciclo nella confezione dei misti cementati
Atti del 12° Convegno Nazionale SIIV “Riqualificazione Funzionale e Sicurezza del Sistema Viario: Materiali nella sovrastruttura stradale"
Autore/i: Bocci, Maurizio; Cardone, Fabrizio; Colagrande, S.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/47963

UNA CORRELAZIONE ANALITICA FRA IL COSTIPAMENTO MARSHALL E CON PRESSA GIRATORIA DEI CONGLOMERATI BITUMINOSI
CONVEGNO NAZIONALE SIIV, PARMA
Autore/i: Bocci, Maurizio; Cerni, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: CONVEGNO NAZIONALE SIIV, PARMA
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44608

INDAGINE SULLE CARATTERISTICHE MECCANICHE DEI CONGLOMERATI BITUMINOSI RICICLATI A FREDDO
BITMAT IV SIMPOSIO EUROPEO - NOTTINGHAM
Autore/i: Bocci, Maurizio; Virgili, Amedeo; Colagrande, S.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/43750

CARATTERISTICHE PRESTAZIONALI DEI CONGLOMERATI BITUMINOSI CONTENENTI MATERIALE FRESATO
CONVEGNO NAZIONALE SIIV, VERONA
Autore/i: Bocci, Maurizio; Montepara, A.; Costa, A.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44304

INFLUENZA DELLE MODALITA' DI LAVORAZIONE SULLE CARATTERISTICHE DI RESISTENZA DELLE MISCELE TERRA CALCE.
CONVEGNO NAZIONALE SIIV, VERONA
Autore/i: Bocci, Maurizio; Cerni, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44558

A FOURIER TRANSFORM INFRARED SPECTROSCOPY STUDY OF MODIFIED BITUMINOUS BINDERS
Proceedings 2nd Eurasphalt & Eurobitume Congress 2000
Autore/i: Bocci, Maurizio; Conti, C.; Micozzi, L.; Tosi, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/55288

PVC AND PET PLASTICS TAKEN FROM SOLID URBAN WASTE IN BITUMINOUS CONCRETE
International conference on the science and engineering of recycling for environmental protection
Autore/i: Bocci, Maurizio; Colagrande, S.; Montepara, A.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44557

THE USE OF RECYCLED MATERIALS OBTAINED FROM DEMOLITION WHITIN THE ROADS WORKS SECTOR.
3° European Symposium on Performance and Durability of Bituminous Materials and Hydraulic and Stabilised Composites
Autore/i: Bocci, Maurizio; Colagrande, S.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44551

Influenza dell’attivante d’adesione sul comportamento reologico del conglomerato bituminoso
X Convegno Nazionale SIIV
Autore/i: Bocci, Maurizio; Cerni, G.; Fiorentino, M.; Virgili, Amedeo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/40450

INFLUENZA DEL GRADO DI COSTIPAMENTO SULLE CARATTERISTICHE MECCANICHE DEI CONGLOMERATI BITUMINOSI.
Convegno Nazionale SIIV, Ancona
Autore/i: Bocci, Maurizio; Cerni, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44358

INDAGINE SPERIMENTALE SULLO SPLITTMASTIX ASPHALT.
XXII Convegno Nazionale Stradale - Perugia Località Bosco
Autore/i: Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/43748

ADESIONE BITUME INERTE. INDAGINE SPERIMENTALE SUGLI ATTIVANTI D'ADESIONE.
Gli attivanti d'adesione e nuove tecnologie di manutenzione stradale - Verona -Verona
Autore/i: Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44353

IL RUOLO DEGLI ATTIVANTI DI ADESIONE NEI CONGLOMERATI BITUMINOSI CONFEZIONATI A CALDO.
XXIII Convegno Nazionale Stradale
Autore/i: Bocci, Maurizio; Colagrande, S.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44556

LE FIBRE STABILIZZANTI IMPIEGATE NEGLI SPLITTMASTIX CONFRONTO PRESTAZIONALE.
Convegno Nazionale SIIV, Ancona
Autore/i: Bocci, Maurizio; Sparvoli, M.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44354

CARATTERIZZAZIONE DI FILLER PER CONGLOMERATI BITUMINOSI.
XXIII Convegno Nazionale Stradale - Verona
Autore/i: Bocci, Maurizio; Giuliani, F.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44547

RELATIONSHIP BETWEEN THE SUPERFICIAL AND STRUTTURAL CHARACTERISTICS OF PAVEMENTS: THE BINDER RHEOLOGICAL CONTRIBUTION IN THE FRICTION PHENOMENON
2° Eurasphalt & Eurobitume Congress, Barcellona
Autore/i: Bocci, Maurizio; Cerni, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/43749

THE ULTRAVIOLET RADIATION IN SHORT-AND LONG-TERM AGING OF BITUMEN
2° Eurasphalt & Eurobitume Congress, Barcellona
Autore/i: Bocci, Maurizio; Cerni, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/50354

SUI MASTICI IMPIEGATI NELLO SPLITTMASTIXASPHALT.
Convegno Nazionale SIIV, Pisa
Autore/i: Bocci, Maurizio; Sparvoli, M.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44554

Alcune relazioni tra grandezze volumetriche e meccaniche di conglomerati bituminosi
XXIII Convegno Nazionale Stradale
Autore/i: Bocci, Maurizio; Cerni, G.; Virgili, Amedeo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Verona
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/40452

Effetti dell'invecchiamento sull'adesivita' dei bitumi stradali
Autore/i: Bocci, Maurizio; G., Cerni; Graziani, Andrea
Classificazione: 5 Altro
Abstract: ADEGUAMENTO FUNZIONALE E MANUTENZIONE DELLE INFRASRUTTURE VIARIE ATTI DEL VIII CONVEGNO NAZIONALE SIIV POLITECNICO DI MILANO, 19-20 OTTOBRE 1998
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/49402

INFLUENZA DELLE POLVERI SULL’ATTRITO RADENTE NELLE PAVIMENTAZIONI STRADALI.
Giornata di Studio sul tema “La sicurezza Intrinseca delle Infrastrutture strada
Autore/i: Bocci, Maurizio; Cerni, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/49263

Influence of the old pavement surface conditions on the effectiveness of tack coat emulsions
II CONGRESSO MONDIALE DELL'EMULSIONE - Bordeaux
Autore/i: Canestrari, Francesco; Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/43660

La Regolarità delle Pavimentazioni Stradali - Confronto tra un approccio deterministico (IRI) ed uno probabilistico
I MATERIALI NELLA SOVRASTRUTTURA STRADALE ATTI DEL VI CONVEGNO SIIV
Autore/i: Graziani, Andrea; Bocci, Maurizio
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: I MATERIALI NELLA SOVRASTRUTTURA STRADALE ATTI DEL VI CONVEGNO SIIV Facoltà di Ingegneria, Ancona 14-16 Ottobre 1996
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/49401

Indagine sperimentale sulla trazione diretta nei conglomerati bituminosi
VI Convegno Nazionale SIIV, Ancona 14÷16 Ottobre 1996
Autore/i: Bocci, Maurizio; G., Cerni; Virgili, Amedeo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: VI Convegno Nazionale SIIV, Ancona 14÷16 Ottobre 1996
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/44355