53 pubblicazioni classificate nel seguente modo:

COMPARISON BETWEEN THE USE OF ALKALI-ACTIVATED, LIME-BASED AND CEMENTITIOUS MATRICES FOR FRCM APPLICATIONS
XVII Convegno Nazionale AIMAT 2023
Autore/i: Donnini, Jacopo; Mobili, Alessandra; Tittarelli, Francesca; Corinaldesi, Valeria
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/317215

Application of digital image correlation to compression tests on tuff masonry panels strengthened by textile reinforced mortar
INTERNATIONAL JOURNAL OF MASONRY RESEARCH AND INNOVATION
Autore/i: Maracchini, G; Chiappini, G; Donnini, J; Quagliarini, E; Corinaldesi, V; Lenci, S
Classificazione: 1 Contributo su Rivista
Abstract: Digital image correlation (DIC) is a contactless full-field optical technique for measuring displacements that can be potentially used in place of more common linear variable differential transformers (LVDTs) to avoid instrumentation damage during destructive tests. However, despite being already adopted in several fields, its potentialities in testing full-scale masonry walls strengthened with textile reinforcing mortar (TRM) have not been fully investigated yet. In this paper, the results obtained by applying a stereo-DIC technique to compression tests of unstrengthened and TRM-strengthened tuff masonry walls (1.0 x 1.2 x 0.25 m(3)) are reported. Results showed that the presence of helical steel bars used to connect the two TRM layers caused crack localisation to the masonry wall, leading to a reduction of compression strength. Compared with the results obtained with LVDTs, the DIC technique was able to accurately monitor tridimensional displacements and cracking pattern evolution. The potentialities and limits of this technique are finally highlighted.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/320491

New Materials and Technologies for Durability and Conservation of Building Heritage
MATERIALS
Autore/i: Coppola, Luigi; Bellezze, Tiziano; Belli, Alberto; Bianco, Alessandra; Blasi, Elisa; Cappello, Miriam; Caputo, Domenico; Chougan, Mehdi; Coffetti, Denny; Coppola, Bartolomeo; Corinaldesi, Valeria; D’Amore, Alberto; Daniele, Valeria; Di Maio, Luciano; Di Palma, Luca; Donnini, Jacopo; Ferrara, Giuseppe; Filippi, Sara; Gastaldi, Matteo; Generosi, Nicola; Giosuè, Chiara; Incarnato, Loredana; Lamastra, Francesca; Liguori, Barbara; Macera, Ludovico; Maqbool, Qaisar; Cristina Mascolo, Maria; Mavilia, Letterio; Mazzoli, Alida; Medici, Franco; Mobili, Alessandra; Montesperelli, Giampiero; Pia, Giorgio; Redaelli, Elena; Ruello, Maria Letizia; Scarfato, Paola; Taglieri, Giuliana; Tittarelli, Francesca; Tulliani, Jean-Marc; Valenza, Antonino
Classificazione: 1 Contributo su Rivista
Abstract: The increase in concrete structures’ durability is a milestone to improve the sustainability of buildings and infrastructures. In order to ensure a prolonged service life, it is necessary to detect the deterioration of materials by means of monitoring systems aimed at evaluating not only the penetration of aggressive substances into concrete but also the corrosion of carbon-steel reinforcement. Therefore, proper data collection makes it possible to plan suitable restoration works which can be carried out with traditional or innovative techniques and materials. This work focuses on building heritage and it highlights the most recent findings for the conservation and restoration of reinforced concrete structures and masonry buildings.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/311867

Flexural Behaviour of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) Under Monotonic Loads and Loading-Unloading Cycles
Flexural Behaviour of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) Under Monotonic Loads and Loading-Unloading Cycles
Autore/i: Generosi, Nicola; Donnini, Jacopo; Lancioni, Giovanni; Corinaldesi, Valeria
Editore: Springer Science and Business Media B.V.
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/306308

Effect of different environmental exposures on the mechanical behavior of enhanced carbon FRCM systems
American Concrete Institute, ACI Special Publication
Autore/i: Donnini, Jacopo; Bompadre, Francesca; Corinaldesi, Valeria
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/313528

Fabric-Reinforced Cementitious Matrix (FRCM) Carbon Yarns with Different Surface Treatments Embedded in a Cementitious Mortar: Mechanical and Durability Studies
MATERIALS
Autore/i: Bompadre, Francesca; Donnini, Jacopo
Classificazione: 1 Contributo su Rivista
Abstract: Nowadays, FRCM systems are increasingly used for the strengthening and retrofitting of existing masonry and reinforced concrete structures. Their effectiveness strongly depends on the bond that develops at the interface between multifilament yarns, which constitute the reinforcing fabric, and the inorganic matrix. It is well known that fabric yarns, especially when constituted by dry carbon fibers, have poor chemical-physical compatibility with inorganic matrices. For this reason, many efforts are being concentrated on trying to improve the interface compatibility by using different surface treatments on multifilament yarns. In this paper, three different surface treatments have been considered. The first two involve yarn pre-impregnation with flexible epoxy resin or nano-silica coating, while the third one involves a fiber oxidation process. Uniaxial tensile tests were carried out on single carbon yarns to evaluate tensile strength, elastic modulus and ultimate strain before and after surface treatments, and also after yarn exposure to accelerated artificial aging conditions (1000 h in saline or alkaline solutions at 40◦C), to evaluate their long-term behavior in aggressive environments. Pull-out tests on single carbon yarns embedded in a cementitious mortar were also carried out, under normal environmental conditions and after artificial exposure. Epoxy proved to be the most effective treatment, by increasing the yarn tensile strength of 34% and the pull-out load of 138%, followed by nano-silica (+9%; +40%). All surface treatments were shown to remain effective even after artificial environmental exposures, with a maximum reduction of yarn tensile strength of about 13%.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/306307

Surface Modification of Glass Textile for the Reinforcement of a Cement-Based Composite: A Review
APPLIED SCIENCES
Autore/i: Bompadre, Francesca; Donnini, Jacopo
Classificazione: 1 Contributo su Rivista
Abstract: The mechanical properties of cement-based composites reinforced with glass textile are strongly affected by the low ability of the inorganic matrix to penetrate within the single filaments, and by the low durability of the fibers in an alkaline environment. Over the last decades, different studies have investigated the possibility to improve the mechanical properties and the durability of this class of composites by modifying the surface of the reinforcement, mainly using different types of organic or inorganic coatings. Although different solutions have been proposed, the feasibility of applying these techniques strictly depend on the final application of the composite. This review aims to give an overview of the different methods that have been proposed in the literature and to highlight advantages and drawbacks.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/288290

Polymeric coatings for ar-glass fibers in cement-based matrices: Effect of nanoclay on the fiber-matrix interaction
APPLIED SCIENCES
Autore/i: Bompadre, F.; Scheffler, C.; Utech, T.; Donnini, J.
Classificazione: 1 Contributo su Rivista
Abstract: Polymeric coatings are widely used to enhance the load bearing capacity and chemical durability of alkali-resistant glass (AR-glass) textile in cement-based composites. The contact zone between coated yarns and concrete matrix plays a major role to enable the stress transfer and has still to be improved for the full exploitation of the mechanical behavior of the composite. As a new approach, this paper studies how the addition of nanoclay particles in the polymer coating formulation can increase the chemical bond between organic coating and inorganic matrix. This includes the description of the water-based coating preparation by dispersing sodium montmorillonites, whereby the resulting coating nanostructure is characterized by X-ray diffraction and energy dispersive X-ray spectroscopy. Single glass fibers were treated by dip-coating. Atomic force microscopy was used to determine the surface roughness, and the effect on the fiber tensile properties was studied. Moreover, the morphological and chemical characteristics of the coatings were compared with the results obtained from single fiber pull-out (SFPO) tests. It was shown that the incorporation of nanoclays leads to increased interfacial shear strength arising from the ability of nanoclay particles to nucleate hydration products in the fiber-matrix contact zone.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/291389

TRM reinforced tuff and fired clay brick masonry: Experimental and analytical investigation on their in-plane and out-of-plane behavior
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Donnini, J.; Maracchini, G.; Lenci, S.; Corinaldesi, V.; Quagliarini, E.
Classificazione: 1 Contributo su Rivista
Abstract: The paper presents the results of an experimental campaign aimed at investigating the in-plane and out-of-plane behavior of tuff and fired clay brick masonry panels reinforced by a commercial, not yet tested, Textile Reinforced Mortar (TRM) system. The TRM, consisting of hydraulic lime mortar coupled with a bidirectional glass fabric (total thickness of 30 mm), was applied on both sides of the panels and connected through stainless-steel helical bars. First, a mechanical characterization of the TRM system was carried out, according to recent guidelines (AC434 and CNR-DT215) by means of tensile tests and single-shear bond tests on the two different substrates. Then, the effectiveness of the reinforcement was investigated through uniaxial compression, diagonal compression and three-point bending tests on masonry panels. After that, experimental results were compared to the predictions of recent guidelines and analytical models available in the literature, by using the mechanical parameters obtained from the TRM mechanical characterization. TRM showed to be very effective in increasing the in-plane shear strength of tuff panels, of about 170%, whereas in the case of fired clay brick ones the increase was limited to 33%. Besides, the diagonal compression strength of reinforced specimens seemed to be strongly influenced by the mortar matrix, instead of by the fabric reinforcement, as it usually happens i.e. for Fabric Reinforced Cementitious Matrix (FRCM) systems. Thus, novel simplified analytical formulations to predict the shear strength of reinforced panels by only considering the contribution of the TRM matrix were provided, discussed and compared to current analytical approaches for FRCM systems. As regards the out-of-plane behavior, the TRM system significantly increased the out-of-plane bending strength and ductility of both tuff and fired clay brick panels. The applicability of current analytical approaches, as well as possible amendments, was also investigated. Finally, the compressive behavior of the walls was not substantially modified by the reinforcement, reasonably due to the low axial stiffness of the connectors and, to a minor extent, because they were dry inserted within the masonry and simply folded over the glass fabric.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/287962

Uniaxial tensile behavior of ultra-high performance fiber-reinforced concrete (uhpfrc): Experiments and modeling
COMPOSITE STRUCTURES
Autore/i: Donnini, J.; Lancioni, G.; Chiappini, G.; Corinaldesi, V.
Classificazione: 1 Contributo su Rivista
Abstract: Ultra-High Performance Fiber-Reinforced Concrete (UHPFRC) is considered a promising material for many structural applications where high strength and high energy absorption capacity are required. The purpose of this work is to study the uniaxial tensile behavior of soft cast (flowable at casting time) UHPFRC by varying the amount of hooked steel fibers (30-mm long) from 0% up to 2.55% by volume. Direct tensile tests have been performed on dog-bone shaped specimens and Digital Image Correlation (DIC) has been used to measure displacements and deformations and to monitor the evolution of cracks. Then, a phase-field model has been implemented in a FE code and numerical simulations have been performed to better understand the effects of different fiber dosages on the mechanical behavior of UHPFRC composites and on their post-elastic evolution. Concrete matrix and fiber reinforcement have been modeled as brittle and elasto-plastic phases of a mixture, whose internal energies are enriched by non-local damage and plasticity contributions. The different failure mechanisms observed in experiments have been reproduced, including the ductile failure experienced by specimens with sufficiently high fiber dosage, which distinguishes for a strain-hardening phase of matrix multi- micro-cracking that anticipates material failure.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/286671

Physical, mechanical and durability properties of GFRP bars with modified acrylic resin (modar) matrix
COMPOSITE STRUCTURES
Autore/i: Spagnuolo, Simone; Donnini, Jacopo; Rinaldi, Zila; Nanni, Antonio
Classificazione: 1 Contributo su Rivista
Abstract: Glass fiber reinforced polymer (GFRP) bars are currently used as internal reinforcement of concrete structures, as an alternative to traditional steel rebars, to avoid corrosion problems and durability issues. GFRP bars are usually made of continuous glass filaments embedded within a polyester (for non-structural applications) or vinyl ester resin. These resins have been used for many years in several technological fields and widely employed as matrices for composite materials with structural functions. However, since the matrix plays a fundamental role in protecting the fibers from the external environment, the development of new organic matrices able to withstand aggressive environmental conditions while keeping a low cost of production is certainly of great interest. In this study, the possibility of using a modified acrylic resin (ModAR), never employed for such applications, as matrix for GFRP bars has been investigated. Physical, mechanical and durability tests have been carried out, according to international standards, to evaluate the technical feasibility of using ModAR matrices. Experimental results showed that ModAR GFRP bars are able to offer high thermal resistance while keeping physical and mechanical properties within standard limits.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/288289

Characterization of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) Tensile Behaviour
Fibre Reinforced Concrete: Improvements and Innovations
Autore/i: Generosi, Nicola; Donnini, Jacopo; Corinaldesi, Valeria
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/300336

Experimental and Numerical Study on the Flexural Behavior of Ultra High Performance Fiber Reinforced Concrete (UHPFRC)
Proceedings of ICNAAM 2021
Autore/i: Donnini, Jacopo; Lancioni, Giovanni
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/289950

Tensile behavior of a glass FRCM system after different environmental exposures
PROCESSES
Autore/i: Donnini, J.; Bompadre, F.; Corinaldesi, V.
Classificazione: 1 Contributo su Rivista
Abstract: The use of Fabric-Reinforced Cementitious Matrix (FRCM) systems as externally bonded reinforcement for concrete or masonry structures is, nowadays, a common practice in civil engineering. However, FRCM durability against aggressive environmental conditions is still an open issue. In this paper, the mechanical behavior of a glass FRCM system, after being subjected to saline, alkaline and freeze-thaw cycles, has been investigated. The experimental campaign includes tensile tests on the fabric yarns, compression and flexural tests on the matrix and tensile tests (according to AC434) on FRCM prismatic coupons. The effects of the different environmental exposures on the mechanical properties of both the constituent materials and the composite system have been investigated and discussed. Ion chromatography analysis has also been performed to better understand the damage mechanisms induced by environmental exposures and to evaluate the ions' penetration within the inorganic matrix. Alkaline exposure was shown to be the most detrimental for Alkali-Resistant (AR) glass fiber yarns, causing a reduction in tensile strength of about 25%. However, mechanical properties of the FRCM composite seemed not to be particularly affected by any of the artificial aging environments.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/288292

Durability Assessment of Recycled Aggregate HVFA Concrete
APPLIED SCIENCES
Autore/i: Corinaldesi, Valeria; Donnini, Jacopo; Giosue', Chiara; Mobili, Alessandra; Tittarelli, Francesca
Classificazione: 1 Contributo su Rivista
Abstract: The possibility of producing high-volume fly ash (HVFA) recycled aggregate concrete represents an important step towards the development of sustainable building materials. In fact, there is a growing need to reduce the use of non-renewable natural resources and, at the same time, to valorize industrial by-products, such as fly ash, that would otherwise be sent to the landfill. The present experimental work investigates the physical and mechanical properties of concrete by replacing natural aggregates and cement with recycled aggregates and fly ash, respectively. First, the mechanical properties of four dierent mixtures have been analyzed and compared. Then, the eectiveness of recycled aggregate and fly ash on reducing carbonation and chloride penetration depth has been also evaluated. Finally, the corrosion behavior of the dierent concrete mixtures, reinforced with either bare or galvanized steel plates, has been evaluated. The results obtained show that high-volume fly ash (HVFA) recycled aggregate concrete can be produced without significative reduction in mechanical properties. Furthermore, the addition of high-volume fly ash and the total replacement of natural aggregates with recycled ones did not modify the corrosion behavior of embedded bare and galvanized steel reinforcement.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/283988

Can textile reinforced mortar (TRM) systems be really effective to increase compressive strength of masonry panels?
Key Engineering Materials
Autore/i: Donnini, J.; Maracchini, G.; Chiappini, G.; Corinaldesi, V.; Quagliarini, E.; Lenci, S.
Editore: Trans Tech Publications Ltd
Classificazione: 2 Contributo in Volume
Abstract: The use of Textile Reinforced Mortar (TRM) systems represent a valid alternative to traditional strengthening techniques, to improve mechanical strength and seismic performance of masonry buildings. Their effectiveness has been validated by several studies [1-4]. However, the TRM contribution in the mechanical behavior of masonry walls, subjected to simple compression, has not yet been fully investigated. In this study, an experimental campaign with the objective of studying the efficiency of TRM systems, applied to clay brick masonry panels, is presented. Compression tests were conducted on clay brick masonry panels with dimensions of 250x1000x1200 mm3 . Glass fiber bidirectional fabrics were applied on both sides of the panels, coupled with lime-based mortar, and connected with stainless steel helical connectors. The total thickness of the reinforcement system is 30 mm. The effect of the TRM reinforcement on the mechanical behavior of the panel is analyzed and experimental results are compared with those of unreinforced panels in terms of ultimate strength and failure modes.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/270983

Tensile behaviour of glass FRCM systems with fabrics’ overlap: Experimental results and numerical modeling
COMPOSITE STRUCTURES
Autore/i: Donnini, Jacopo; Chiappini, Gianluca; Lancioni, Giovanni; Corinaldesi, Valeria
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/266132

Sustainability in Construction Materials: From Waste Valorization to Circular Economy
The First Outstanding 50 Years of “Università Politecnica delle Marche”
Autore/i: Ruello, Maria Letizia; Bellezze, Tiziano; Corinaldesi, Valeria; Donnini, Jacopo; Eusebi, Anna Laura; Fatone, Francesco; Fava, Gabriele; Favoni, Orlando; Fratesi, Romeo; Giosue', Chiara; Giuliani, Giampaolo; Marcellini, Mirco; Mazzoli, Alida; Mobili, Alessandra; Roventi, Gabriella; Tittarelli, Francesca
Editore: Springer
Luogo di pubblicazione: Cham
Classificazione: 2 Contributo in Volume
Abstract: Already from the beginning, 50 years ago, the first nucleus of researchers establishing the research group, was convinced that the construction sector was the best option for the valorization of industrial by-products as “secondary raw materials”. In fact, this sector is probably the largest consumer of resources and the largest waste generator, consequently it has huge environmental impact. On the other hand, construction materials affect the performance of buildings with respect to safety, health, environmental performance and energy efficiency. Manufacturing of construction products using alternative raw materials; recycling to manage construction and demolition waste; durability and environmental compatibility of materials: all these were the different and challenging fields of research that the group has faced in a continuous effort of innovation and cooperation at national and international level. The focus of the group was already perfectly in line with what is now called “Circular Economy”, which at present is considered a revolution in the way of human economic development. We are sure the group thus contributed to this revolution even before the term was in current use. We feel ready for the next 50.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/272692

A comparison between the use of FRP, FRCM and HPM for concrete confinement
COMPOSITES. PART B, ENGINEERING
Autore/i: Donnini, Jacopo; Spagnuolo, Simone; Corinaldesi, Valeria
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/266133

A comparison between the use of FRP, FRCM and HPM for concrete confinement
COMPOSITES. PART B, ENGINEERING
Autore/i: Donnini, J.; Spagnuolo, S.; Corinaldesi, V.
Classificazione: 1 Contributo su Rivista
Abstract: The use of new methods to strengthen and rehabilitate existing concrete and masonry structures is one of the challenges that the engineering community is facing in recent years. In this field, composite materials are acquiring more and more success, due to lower invasiveness and ease of application if compared to more traditional systems (e.g. steel plates or reinforced concrete jacketing). This work, based on experimental investigations, aims to propose a comparison between three different methods as possible strengthening solutions for existing concrete elements. Twenty compression tests were conducted on reduced scale concrete columns, realized by using a low performance concrete, in order to reproduce the poor mechanical properties of most existing structures. Two of them were left unconfined, while the other ones were reinforced by using Fiber Reinforced Polymer (FRP), Fiber Reinforced Cementitious Matrix (FRCM) or High Performance Mortar (HPM) systems. The effectiveness of the different strengthening techniques and the main differences in terms of structural response were investigated. Experimental results were then compared with predictions deriving from guidelines and theoretical models from the literature.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/278855

Durability of glass FRCM systems: Effects of different environments on mechanical properties
COMPOSITES. PART B, ENGINEERING
Autore/i: Donnini, J.
Classificazione: 1 Contributo su Rivista
Abstract: Composite systems consisting of fibers in the form of open fabrics embedded within inorganic matrices (Fabric Reinforced Cementitious Matrix, FRCM) have become a well-established technique for strengthening interventions on masonry and concrete structures. In particular, the use of fabrics made of glass fibers coupled with inorganic matrices showed to be very promising, thanks to the high mechanical properties of the fibers, low cost of the raw materials and good compatibility with the substrate, especially in the case of masonry structures. However, the durability of FRCM systems, such as the resistance to salt attack, alkaline environments or moisture, is an issue that hasn't be thoroughly investigated yet. In this study, the effect of saline and 100% Relative Humidity (RH) environments on the mechanical behavior of FRCM systems reinforced with glass fabrics has been investigated. The glass FRCM systems have been studied and characterized considering both the constituent materials (hydraulic mortar and glass fabric) and the substrate (fired clay brick) on which they were applied. Mechanical characterization tests on mortars and fabrics have been performed before and after exposure to different aging conditioning protocols. The same protocols have been adopted for specimens constituted by FRCM strips applied on clay brick substrates, to study the effect of different environments on the shear bond behavior of the composite system.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/280707

Failure modes in FRCM systems with dry and pre-impregnated carbon yarns: Experiments and modeling
COMPOSITES. PART B, ENGINEERING
Autore/i: Donnini, Jacopo; Lancioni, Giovanni; Corinaldesi, Valeria
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/253719

Study of green FRCM systems made of lime-based matrix and hemp fibers
American Concrete Institute, ACI Special Publication
Autore/i: Donnini, J.; Corinaldesi, V.
Editore: American Concrete Institute
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/267395

Binders alternative to Portland cement and waste management for sustainable construction – Part 2
JOURNAL OF APPLIED BIOMATERIALS & FUNCTIONAL MATERIALS
Autore/i: Coppola, Luigi; Bellezze, Tiziano; Belli, Alberto; C Bignozzi, Maria; Bolzoni, Fabio; Brenna, Andrea; Cabrini, Marina; Candamano, Sebastiano; Cappai, Marta; Caputo, Domenico; Carsana, Maddalena; Casnedi, Ludovica; Cioffi, Raffaele; Cocco6, Ombretta; Coffetti, Denny; Colangelo8, Francesco; Coppola, Bartolomeo; Corinaldesi, Valeria; Crea, Fortunato; Crotti, Elena; Daniele, Valeria; De Gisi, Sabino; Delogu, Francesco; V Diamanti, Maria; Di Maio, Luciano; Di Mundo, Rosa; Di Palma, Luca; Donnini, Jacopo; Farina, Ilenia; Ferone, Claudio; Frontera, Patrizia; Gastaldi, Matteo; Giosue', Chiara; Incarnato, Loredana; Liguori, Barbara; Lollini, Federica; Lorenzi, Sergio; Manzi, Stefania; Marino, Ottavio; Marroccoli, Milena; C Mascolo, Maria; Mavilia, Letterio; Mazzoli, Alida; Medici, Franco; Meloni, Paola; Merlonetti, Glauco; Mobili, Alessandra; Notarnicola, Michele; Ormellese, Marco; Pastore, Tommaso; Pia Pedeferri, Maria; Petrella, Andrea; Pia6, Giorgio; Redaelli, Elena; Roviello, Giuseppina; Scarfato, Paola; Scoccia, Giancarlo; Taglieri, Giuliana; Telesca, Antonio; Tittarelli, Francesca; Todaro, Francesco; Vilardi, Giorgio; Yang, Fan
Classificazione: 1 Contributo su Rivista
Abstract: The paper represents the “state of the art” on sustainability in construction materials. In Part 1 of the paper, issues related to production, microstructures, chemical nature, engineering properties, and durability of mixtures based on binders alternative to Portland cement were presented. This second part of the paper concerns the use of traditional and innovative Portland-free lime-based mortars in the conservation of cultural heritage, and the recycling and management of wastes to reduce consumption of natural resources in the production of construction materials. The latter is one of the main concerns in terms of sustainability since nowadays more than 75% of wastes are disposed of in landfills.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/259227

Study of environmentally friendly mortars prepared with recycled concrete aggregates and biomass ash
American Concrete Institute, ACI Special Publication
Autore/i: Corinaldesi, V.; Donnini, J.; Merlonetti, G.
Editore: American Concrete Institute
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/267396

Mechanical, electrical and self-sensing properties of cementitious mortars containing short carbon fibers
JOURNAL OF BUILDING ENGINEERING
Autore/i: Donnini, Jacopo; Bellezze, Tiziano; Corinaldesi, Valeria
Classificazione: 1 Contributo su Rivista
Abstract: This paper is aimed at exploring mechanical, electrical and self-sensing properties of cement-based mortars through the addition of short carbon fibers, at different dosages (2%, 3%, 4% by weight of cement). Compression and bending tests on carbon fiber reinforced mortars (CFRM) were performed. The addition of carbon fibers showed to enhance the mortars’ flexural strength by increasing the fibers content, while no improvement was found in the compressive strength. Electrical resistivity of the CFRM, at different days of curing, was evaluated by AC impedance measurements, using two stainless steel wire meshes as electrodes. The electrical resistivity decreased with time, until reaching a constant value after about 60 days of curing. Carbon fibers were able to drastically reduce the mortar resistivity, up to values below 150 Ω cm. The effect of fibers dosage on the ability of the mortar to change its electrical resistivity when subjected to different stress states was also studied. The specimens were gradually loaded up to 50–60% of the maximum compressive strength, carrying out two loading/unloading cycles, while resistivity was measured using a conductivity meter. Depending on the fibers dosage and stress state within the material, CFRM resistivity changed with significant variations.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/266205

Concrete columns confined with different composite materials
MATEC Web of Conferences
Autore/i: Donnini, J.; Corinaldesi, V.
Editore: EDP Sciences
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/267394

Binders alternative to Portland cement and waste management for sustainable construction - Part 1
JOURNAL OF APPLIED BIOMATERIALS & FUNCTIONAL MATERIALS
Autore/i: Coppola, Luigi; Bellezze, Tiziano; Belli, Alberto; Chiara Bignozzi, Maria; Bolzoni, Fabio; Brenna, Andrea; Cabrini, Marina; Candamano, Sebastiano; Cappai, Marta; Caputo, Domenico; Carsana, Maddalena; Casnedi, Ludovica; Cioffi, Raffaele; Cocco, Ombretta; Coffetti, Denny; Colangelo, Francesco; Coppola, Bartolomeo; Corinaldesi, Valeria; Crea, Fortunato; Crotti, Elena; Daniele, Valeria; De Gisi, Sabino; Delogu, Francesco; Vittoria Diamanti, Maria; Di Maio, Luciano; Di Mundo, Rosa; Di Palma, Luca; Donnini, Jacopo; Farina, Ilenia; Ferone, Claudio; Frontera, Patrizia; Gastaldi, Matteo; Giosue', Chiara; Incarnato, Loredana; Liguori, Barbara; Lollini, Federica; Lorenzi, Sergio; Manzi, Stefania; Marino, Ottavio; Marroccoli, Milena; Cristina Mascolo, Maria; Mavilia, Letterio; Mazzoli, Alida; Medici, Franco; Meloni, Paola; Merlonetti, Glauco; Mobili, Alessandra; Notarnicola, Michele; Ormellese, Marco; Pastore, Tommaso; Pia Pedeferri, Maria; Petrella, Andrea; Pia, Giorgio; Redaelli, Elena; Roviello, Giuseppina; Scarfato, Paola; Scoccia, Giancarlo; Taglieri, Giuliana; Telesca, Antonio; Tittarelli, Francesca; Todaro, Francesco; Vilardi and Fan Yang, Giorgio
Classificazione: 1 Contributo su Rivista
Abstract: This review presents “a state of the art” report on sustainability in construction materials. The authors propose different solutions to make the concrete industry more environmentally friendly in order to reduce greenhouse gases emissions and consumption of non-renewable resources. Part 1—the present paper—focuses on the use of binders alternative to Portland cement, including sulfoaluminate cements, alkali-activated materials, and geopolymers. Part 2 will be dedicated to traditional Portland-free binders and waste management and recycling in mortar and concrete production.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/259226

Experimental Analysis of the Aging Effects on Shielding Effectiveness of Cementitious Composites
2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity, EMC, SI and PI 2018
Autore/i: Bastianelli, Luca; Primiani, Valter Mariani; Moglie, Franco; Donnini, Jacopo; Mazzoli, Alida; Corinaldesi, Valeria; Gradoni, Gabriele; Micheli, Davide
Editore: Institute of Electrical and Electronics Engineers Inc.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The shielding effectiveness of cementitious composites is analyzed by means of the nested reverberation chamber method. This feature is evaluated as function of time in order to estimate the aging effects. Different cementitious mixtures are considered and carbon/metallic fibers are put within the mortar in order to improve the shielding effectiveness considering the frequency band from 0.8 GHz up to 8.4 GHz
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/266049

Effect of graphene oxide and metallic fibers on the electromagnetic shielding effect of engineered cementitious composites
JOURNAL OF BUILDING ENGINEERING
Autore/i: Mazzoli, A.; Corinaldesi, V.; Donnini, J.; Di Perna, C.; Micheli, D.; Vricella, A.; Pastore, R.; Bastianelli, L.; Moglie, F.; Mariani Primiani, V.
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/255936

Bond behavior of FRCM carbon yarns embedded in a cementitious matrix: Experimental and numerical results
Mechanics of Masonry Structures Strengthened with Composite Materials II
Autore/i: Donnini, Jacopo; Lancioni, Giovanni; Bellezze, Tiziano; Corinaldesi, Valeria
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/252864

A variational model for determining fracture modes in FRCM Systems
PROCEDIA STRUCTURAL INTEGRITY
Autore/i: Lancioni, Giovanni; Donnini, Jacopo; Corinaldesi, Valeria
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/247560

Fabric-reinforced cementitious matrix behavior at high-temperature: Experimental and numerical results
COMPOSITES. PART B, ENGINEERING
Autore/i: Donnini, Jacopo; De Caso y. Basalo, Francisco; Corinaldesi, Valeria; Lancioni, Giovanni; Nanni, Antonio
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/238683

A phase-field variational approach to model the fracture mechanisms of fabric-reinforced cementitious matrices
ICF 2017 - 14th International Conference on Fracture
Autore/i: Lancioni, G.; Donnini, J.
Editore: International Conference on Fracture
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/268383

Fracture mechanisms in FRCM systems: Experiments and variational modeling
AIMETA 2017 - Proceedings of the 23rd Conference of the Italian Association of Theoretical and Applied Mechanics
Autore/i: Lancioni, G.; Donnini, J.
Editore: Centro Servizi d'Ateno srl
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/258227

ELECTROMAGNETIC PROPERTIES OF CARBON NANOTUBE REINFORCED CONCRETE COMPOSITES FOR FREQUENCY SELECTIVE SHIELDING STRUCTURES
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Micheli, D.; Vricella, A.; Pastore, R.; Delfini, A.; Buneno Morles, R.; Marchetti, M.; Santoni, F.; Bastianelli, Luca; Moglie, Franco; MARIANI PRIMIANI, Valter; Corinaldesi, Valeria; Mazzoli, Alida; Donnini, Jacopo
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/240471

Mechanical characterization of different FRCM systems for structural reinforcement
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Donnini, Jacopo; Corinaldesi, Valeria
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246565

STUDY OF ENHANCED FIBER REINFORCED CEMENTITIOUS MATRIX (FRCM) SYSTEMS FOR STRUCTURAL REHABILITATION
Autore/i: Donnini, Jacopo
Editore: Università Politecnica delle Marche
Classificazione: 8 Tesi di dottorato
Abstract: Il mondo dei materiali compositi è in continua evoluzione ed il loro utilizzo per il rinforzo, l’adeguamento sismico e la messa in sicurezza di strutture civili è diventata una pratica comune tra gli ingegneri ed architetti. Gli FRCM (Fabric Reinforced Cementitious Matrix) rappresentano una nuova metodologia per il rinforzo strutturale e si stanno proponendo come una valida alternativa ai più affermati FRP, ogni volta che le condizioni di progetto non permettano l'uso di compositi a base di polimeri organici. Gli FRCM sono definiti dall’American Concrete Institute (ACI549) come dei sistemi costituiti dall’accoppiamento di uno o più strati di rete di fibra a elevate prestazioni e di una matrice inorganica stabilizzata impiegata con la funzione di adesivo. Gli FRCM sono generalmente costituiti da reti di fibre secche, tuttavia, si è dimostrato che il legame di interfaccia matrice-fibra non è ottimale, in quanto soltanto i filamenti esterni in contatto con la matrice sono in grado di trasferire gli sforzi, mentre i filamenti interni si sfilano a causa al basso attrito tra le fibre. Questo lavoro ha lo scopo di contribuire a migliorare ed approfondire lo stato dell’arte dei sistemi FRCM in diverse direzioni ed è suddiviso in quattro studi. In particolare la ricerca si è dedicata alla caratterizzazione di diversi sistemi FRCM, in modo da chiarire la differenza in termini di comportamento e prestazioni tra reti di fibre secche o apprettate, di analizzare gli effetti delle elevate temperature sulle proprietà meccaniche degli FRCM, di valutare l'efficacia nell’utilizzo di diverse malte (cementizie e geopolimeriche) e la compatibilità di quest’ultime con supporti in muratura. Lo scopo del primo studio è quello di analizzare come l’utilizzo di diversi tipi di coating (pre-impregnazione a base di resine epossidiche) applicati a reti bi-direzionali in fibra di carbonio vada ad influenzare il comportamento di interfaccia fibre-malta e le proprietà meccaniche dei sistemi FRCM. L'efficacia del coating è stato studiato mediante test di trazione diretta, pull-off e di adesione al supporto. La sperimentazione è stata condotta combinando diversi tipi di rete in carbonio e matrici cementizie, variando il livello di pre-impregnazione del tessuto durante la sua fabbricazione (leggera, media e completa impregnazione). Inoltre, è stato sperimentato e studiato l'utilizzo di uno strato di sabbia quarzifera applicato sulle fibre dopo l’impregnazione. Le prove sperimentali hanno dimostrato un notevole miglioramento del legame di interfaccia tra le fibre e la matrice inorganica e, quindi, un generale miglioramento delle prestazioni del sistema FRCM, anche impregnando le fibre parzialmente, a seconda del tipo di malta usata. Lo scopo del secondo studio è quello di valutare il comportamento meccanico dei sistemi FRCM sottoposti ad alte temperature. Diversi sistemi FRCM sono stati valutati, utilizzando reti bidirezionali in fibra di carbonio secche o pre-impregnate. La campagna sperimentale ha riguardato test di trazione monoassiale su provini di FRCM e test di adesione a supporti in muratura con temperature comprese tra 20 °C e 120 °C. Il terzo studio riguarda il possibile utilizzo di malte geopolimeriche come matrici per sistemi FRCM, accoppiate a diverse reti in fibra di carbonio. Lo studio ha incluso la caratterizzazione meccanica della malta, prove di trazione e di adesione a supporti in muratura. Infine il quarto studio analizza il legame di interfaccia FRCM-substrato in muratura, considerando l'utilizzo di diversi primers inorganici per migliorare l’adesione al supporto.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/242998

Study of high-temperature effects on the FRCM mechanical properties
4th Workshop on “The New Boundaries of Structural Concrete”
Autore/i: Donnini, Jacopo; De Caso y. Basalo, F.; Corinaldesi, Valeria; Nanni, A.
Editore: Edizioni MReady
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/240112

Evolution of FRCM strengthening systems: fabric coating bond enhancement
REHABEND 2016, Euro-American Congress about “Construction pathology, rehabilitation technology and heritage management”
Autore/i: Donnini, Jacopo; De Caso y. Basalo, F.; Corinaldesi, Valeria; Nanni, A.
Editore: Graficas Iguna
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/240118

STUDY OF ADVANCED CEMENT-BASED COMPOSITES WITH ENHANCED FUNCTIONAL PROPERTIES
JOURNAL OF APPLIED BIOMATERIALS & FUNCTIONAL MATERIALS
Autore/i: Donnini, Jacopo; Nardinocchi, Alessandro; Magrini, Isabella; Poggetti, Ilaria; Corinaldesi, Valeria
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/238907

Properties of fibre reinforced cement-based composites containing expansive agent
FRC: The Modern Landscape, Proceedings of the 9th RILEM International Symposium on Fiber Reinforced Concrete, PRO 116
Autore/i: Corinaldesi, Valeria; Donnini, Jacopo; Nardinocchi, Alessandro; Merlonetti, Glauco
Editore: RILEM Publications S.A.R.L.
Luogo di pubblicazione: Paris
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/240110

Mechanical properties of FRCM using carbon fabrics with different coating treatments
COMPOSITES. PART B, ENGINEERING
Autore/i: Donnini, Jacopo; Corinaldesi, Valeria; Nanni, Antonio
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/229972

Effect of graphene oxide addition on the mechanical and thermal properties of cement-based composites
JOURNAL OF APPLIED BIOMATERIALS & FUNCTIONAL MATERIALS
Autore/i: Donnini, Jacopo; DI PERNA, Costanzo; Mazzoli, Alida; Christiansen, S; Corinaldesi, Valeria
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/236227

Reuse of recycled glass in mortar manufacturing
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
Autore/i: Corinaldesi, Valeria; Nardinocchi, Alessandro; Donnini, Jacopo
Classificazione: 1 Contributo su Rivista
Abstract: This work is aimed at studying the possibility of reusing waste glass from crushed containers as aggregate for preparing mortars. At present, this kind of reuse is still not common due to the risk of alkali–silica reaction (ASR) between alkalis of the cement and silica of the waste glass. This expansive reaction can cause great problems of cracking and, consequently, it can be extremely deleterious for the mortar durability. The influence of both size and colour of recycled glass coming from crushed containers on the durability of mortars is studied. The attention is focused on both mechanical behaviour, investigated by means of bending and compression tests, as well as durability, studied by means of accelerated tests for evaluating the tendency to expand under alkaline environment due to ASR. Several mortars are prepared by replacing at different rate the quartz sand with coarse glass cullet of different colours: clear (i.e. uncoloured), green and amber. Then, pulverised clear glass is added to the mortar mixtures, also in the presence of class F fly ash. Results obtained show that by using both green and amber glass cullet the mortars are stable, as well as by using powder glass, which also shows a significant pozzolanic effect. On the other hand, considerable expansion due to ASR is detected by using clear glass cullet.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/239544

Study of physical and elasto-mechanical behaviour of fiber-reinforced concrete made of cement containing biomass ash
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
Autore/i: Corinaldesi, Valeria; Nardinocchi, Alessandro; Donnini, Jacopo
Classificazione: 1 Contributo su Rivista
Abstract: In this work, the influence of different kinds of fibres on Fibre-reinforced concrete (FRC) cracking behaviour is examined. Several FRC mixtures are designed, in which cement is partially replaced at 20% by weight of cement by a biomass ash coming from paper mill sludge incineration. These FRCs are prepared by alternatively using steel fibres, polypropilene macro-fibres, glass macro-fibres, as well as hybrid or bicomponent synthetic fibres. The dosage of fibres is always equal to .55% by concrete mixing volume. As reference, also a mixture with the same mixture proportions but without fibre reinforcement is prepared and tested. Ring test according to ASTM C 1581-04 and free shrinkage test are carried out in the same exposure conditions: 21 °C and 50% relative humidity. Moreover, compressive and tensile strengths of FRCs, as well as their elastic modulus, are evaluated on cubic specimens up to 28 days of curing, and, in particular, also at the time of ring cracking. In this way, other important information could be extrapolated by introducing these experimental data in suitable numerical model of the ring concrete specimens available in the literature. This procedure enables to study the influence of the kind of fibres on the potential for early-age cracking of concrete, as well as to identify the effect of tensile creep on concrete cracking. Results obtained show the effectiveness of the randomly dispersed fibres in counteracting the early cracking of FRC.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/239546

Improving Adhesion at the Fibers/Matrix Interface in FRCM for Masonry Strengthening
Conference Proceedings of the ICCS18 - 18th International Conference on Composite Structures
Autore/i: Corinaldesi, Valeria; Donnini, Jacopo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/240106

Lightweight plasters containing plastic waste for sustainable and energy-efficient building
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Corinaldesi, Valeria; Donnini, Jacopo; Nardinocchi, Alessandro
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/228459

FRCM mechanical properties using carbon fabrics with different coating treatments
ACI SP 305
Autore/i: Donnini, Jacopo; Corinaldesi, Valeria; Nanni, Antonio
Editore: American Concrete Institute
Luogo di pubblicazione: Farmingoton Hills
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/235098

The influence of calcium oxide addition on properties of fiber reinforced cement-based composites
JOURNAL OF BUILDING ENGINEERING
Autore/i: Corinaldesi, Valeria; Donnini, Jacopo; Nardinocchi, Alessandro
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/228458

The Influence of Expansive Agent on the Performance of Fiber Reinforced Cement-Based Composites
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Corinaldesi, Valeria; Nardinocchi, Alessandro; Donnini, Jacopo
Classificazione: 1 Contributo su Rivista
Abstract: In this work several fibre reinforced cement-based composites (FRCCs) as well as ultra high performance concretes (UHPCs) were studied, in which CaO-based expansive agent was added in order to help in reducing the risk of cracking induced by drying shrinkage. Three different kinds of metallic reinforcing fibres were tested: flat (and flexible) steel-alloy fibres, and brass-coated either hooked or straight steel fibres. All the mixtures were characterised at both fresh and hardened state, by measuring fresh consistency, compressive and flexural strength, as well as length changes under drying shrinkage test. Moreover, FRCC microstructure was investigated by means of Mercury Intrusion Porosimetry (MIP) and Scanning Electron Microscope (SEM) observations. The effect on mechanical performance of a thermal pre-treatment at 80 °C for the first 24 h of curing after casting was also evaluated. Results obtained confirmed the effectiveness of CaO addition on material stability under drying shrinkage; moreover, it seems to produce a beneficial effect on flexural strength if used with brass-coated fibres. The reason of this synergy probably lies in the formation of calcium-hydroxy-zincate crystals at the interface between fibres and surrounding cement paste (phenomenon promoted by dezincification of brass in alkaline environment), able to significantly improve the quality of the interface fibre–matrix by increasing adhesion.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/227666

Lightweight aggregate mortars for sustainable and energy-efficient building
ADVANCED MATERIALS RESEARCH
Autore/i: Corinaldesi, Valeria; Nardinocchi, Alessandro; Donnini, Jacopo
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/210123

Effectiveness of synthetic structural fibers for self-compacting fiber reinforced concretes
The new boundaries of Structural Concrete
Autore/i: Corinaldesi, Valeria; Nardinocchi, Alessandro; Donnini, Jacopo
Editore: Edizioni MReady
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/210120