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The paper investigates the effects of ageing on the linear and nonlinear viscoelastic properties of bituminous binders for paving applications. Four neat binders were analysed in their unaged state and after long-term ageing, which was simulated in the laboratory with the Rolling Thin Film Oven (RTFO) and the Pressure Ageing Vessel (PAV). Amplitude sweep tests and frequency sweep tests were performed to explore the response in the linear domain. Repeated strain sweep tests were carried out to isolate nonlinearity from other mechanisms related to damage. The time–temperature superposition principle and the generalised Maxwell model with a Prony series discretization were used to describe the overall viscoelastic response of binders, introducing strain-dependent shift factors to account for nonlinearity. Results indicate that the adopted experimental and modelling approach allows a proper assessment of the effects of ageing on viscoelasticity.
Lucia Tsantilis; Shane B. Underwood; Fabrizio Miglietta; Pier Paolo Riviera; Orazio Baglieri; Ezio Santagata. Ageing effects on the linear and nonlinear viscoelasticity of bituminous binders. Road Materials and Pavement Design 2021, 22, S37 -S50.
AMA StyleLucia Tsantilis, Shane B. Underwood, Fabrizio Miglietta, Pier Paolo Riviera, Orazio Baglieri, Ezio Santagata. Ageing effects on the linear and nonlinear viscoelasticity of bituminous binders. Road Materials and Pavement Design. 2021; 22 (sup1):S37-S50.
Chicago/Turabian StyleLucia Tsantilis; Shane B. Underwood; Fabrizio Miglietta; Pier Paolo Riviera; Orazio Baglieri; Ezio Santagata. 2021. "Ageing effects on the linear and nonlinear viscoelasticity of bituminous binders." Road Materials and Pavement Design 22, no. sup1: S37-S50.
The experimental work described in this paper investigated the coupled effects of rest time and rest temperature on the self-healing potential of bituminous binders. A set of neat and polymer-modified materials were subjected to self-healing tests that included two oscillatory shear loading phases separated by a single rest period. Multiple testing conditions were analyzed by combining various rest times and rest temperatures. Self-healing was quantitatively assessed by introducing two healing indices, based on the magnitude of stiffness and fatigue endurance gain, in which time-dependent artefacts were properly quantified and removed. Experimental results were found to be consistent with the kinetics of self-healing phenomena and underscored the importance of considering rest time coupled with rest temperature for a reliable evaluation of true self-healing properties. A new model was proposed to describe the self-healing performance of bituminous binders and self-healing charts were constructed from generalized logistic functions incorporating the effects of both rest time and temperature.
Fabrizio Miglietta; Lucia Tsantilis; Orazio Baglieri; Ezio Santagata. A new approach for the evaluation of time–temperature superposition effects on the self-healing of bituminous binders. Construction and Building Materials 2021, 287, 122987 .
AMA StyleFabrizio Miglietta, Lucia Tsantilis, Orazio Baglieri, Ezio Santagata. A new approach for the evaluation of time–temperature superposition effects on the self-healing of bituminous binders. Construction and Building Materials. 2021; 287 ():122987.
Chicago/Turabian StyleFabrizio Miglietta; Lucia Tsantilis; Orazio Baglieri; Ezio Santagata. 2021. "A new approach for the evaluation of time–temperature superposition effects on the self-healing of bituminous binders." Construction and Building Materials 287, no. : 122987.
The main objective of the study described in this paper was to identify possible relationships between the chemical composition and the rheological and fatigue properties of asphalt binders. In order to address such an issue, two asphalt binders of different penetration grade were subjected to four ageing treatments of increasing severity, with the consequent change of their chemical composition. Chemical analyses were performed by means of thin layer chromatography, with the evaluation of the relative percentages of saturates, aromatics, resins and asphaltenes (SARA fractions) and with the corresponding calculation of the colloidal instability index. For the assessment of their rheological properties, virgin and aged binders were subjected to rotational viscosity and frequency sweep tests. Fatigue behavior was evaluated by means of linear amplitude sweep tests and corresponding results were analyzed by means of the simplified viscoelastic continuum damage model. Obtained results, which were also used for the calculation of purposely defined ageing indices, showed that there is a strong correlation between the colloidal instability of asphalt binders and their properties evaluated both in flow conditions and in the linear viscoelastic region. In particular, higher levels of instability are associated to a more viscous and stiffer response regardless of the type of considered original binder. Results from fatigue tests demonstrated that damage endurance is also affected by the degree of instability. However, it was found that correlations exist only when the degree of colloidal instability is below a certain threshold. Above such a limit, fatigue resistance collapses and no prediction of endurance is possible. Although the outcomes of this study need to be supplemented by further research, they are useful to pavement engineers for a better understanding of the behavior of aged asphalt binders and of the mechanisms which underly chemical ageing.
Reza Salehfard; Hamid Behbahani; Davide Dalmazzo; Ezio Santagata. Effect of colloidal instability on the rheological and fatigue properties of asphalt binders. Construction and Building Materials 2021, 281, 122563 .
AMA StyleReza Salehfard, Hamid Behbahani, Davide Dalmazzo, Ezio Santagata. Effect of colloidal instability on the rheological and fatigue properties of asphalt binders. Construction and Building Materials. 2021; 281 ():122563.
Chicago/Turabian StyleReza Salehfard; Hamid Behbahani; Davide Dalmazzo; Ezio Santagata. 2021. "Effect of colloidal instability on the rheological and fatigue properties of asphalt binders." Construction and Building Materials 281, no. : 122563.
This paper presents the results of an experimental investigation that focused on the failure properties of asphalt binders at low temperatures. A novel test method was developed, based on the use of the dynamic shear rheometer equipped with 4 mm parallel plates. The method entails the application of constant shear strain rates at various temperatures until failure. Test data are modelled by means of the elastic-viscoelastic correspondence principle and by thereafter referring to the shear stress at failure, to a purposely defined brittleness index and to a critical brittleness temperature. Results discussed in the paper, which refer to a preliminary set of experimental data, indicate that the proposed methodology may be very effective in evaluating and comparing low temperature failure properties of asphalt binders of various types and origins.
Orazio Baglieri; Chiara Tozzi; Davide Dalmazzo; Lucia Tsantilis; Ezio Santagata. A novel methodology for the evaluation of low temperature failure properties of asphalt binders. Materials and Structures 2021, 54, 1 -13.
AMA StyleOrazio Baglieri, Chiara Tozzi, Davide Dalmazzo, Lucia Tsantilis, Ezio Santagata. A novel methodology for the evaluation of low temperature failure properties of asphalt binders. Materials and Structures. 2021; 54 (1):1-13.
Chicago/Turabian StyleOrazio Baglieri; Chiara Tozzi; Davide Dalmazzo; Lucia Tsantilis; Ezio Santagata. 2021. "A novel methodology for the evaluation of low temperature failure properties of asphalt binders." Materials and Structures 54, no. 1: 1-13.
In hot climate regions asphalt mixes can be designed using the classical volumetric approach supplemented by the evaluation of basic mechanical parameters. To minimize the risk of permanent deformation, composition of the mixes can be defined by selecting densely packed aggregates and low binder contents. Despite the effectiveness of such an approach, mix design systems need to be improved by including performance-based tests that focus on the evaluation of the true rutting potential of asphalt mixes. The investigation described in this paper addressed these issues by considering twelve rut-resistant asphalt mixes designed as per the requirements set in the State of Qatar. These mixes, containing neat and polymer-modified binders (PMBs), were subjected to the Hamburg Wheel-Track Test (HWTT), dynamic modulus test and flow number test. Analysis of experimental data led to tentative requirements set on the results of dry HWTTs that can be introduced in the mix design framework currently adopted in the State of Qatar. Calculation of rank correlation coefficients showed that the various tests can be employed in different conditions for the assessment of the true rutting potential of asphalt mixes.
Haissam Sebaaly; Pier Paolo Riviera; Sudhir Varma; James W. Maina; Ezio Santagata. Performance-based assessment of rutting resistance of asphalt mixes designed for hot climate regions. International Journal of Pavement Engineering 2020, 1 -12.
AMA StyleHaissam Sebaaly, Pier Paolo Riviera, Sudhir Varma, James W. Maina, Ezio Santagata. Performance-based assessment of rutting resistance of asphalt mixes designed for hot climate regions. International Journal of Pavement Engineering. 2020; ():1-12.
Chicago/Turabian StyleHaissam Sebaaly; Pier Paolo Riviera; Sudhir Varma; James W. Maina; Ezio Santagata. 2020. "Performance-based assessment of rutting resistance of asphalt mixes designed for hot climate regions." International Journal of Pavement Engineering , no. : 1-12.
The management of sawing sludge originated from cutting operations of ornamental stones represents a challenging task as a consequence of its peculiar composition that includes non-negligible amounts of heavy metals resulting from the wear and tear of cutting tools. The aim of the research work presented in this paper was to investigate the feasibility of using these by-products as supplementary constituents of cementitious mixtures employed for the formation of Fluidized Thermal Backfills (FTB). These mixtures are designed and produced for filling operations in pavement subgrades in which high-voltage electrical transmission cables are buried for protection purposes. Two different types of sawing sludge were thoroughly analyzed from a physical and chemical point of view and thereafter employed for the laboratory production of four FTB mixtures. Then, these were subjected to thermal, mechanical, and environmental tests in order to verify their suitability for their intended use. All investigated FTB mixtures exhibited a satisfactory and stable thermal conductivity, and they also displayed enhanced stiffness properties in comparison to standard subgrade and sub-base materials. Controversial results were obtained with respect to environmental properties resulting from leaching tests, thus suggesting that further investigations are needed before any full-scale application can take place.
Lorena Zichella; Eldho Choorackal; Michela Airoldi; Pier Paolo Riviera; Rossana Bellopede; Ezio Santagata. Performance-Related Assessment of the Potential Use of Sawing Sludge in Cementitious Fluidized Thermal Backfills. Applied Sciences 2020, 10, 8243 .
AMA StyleLorena Zichella, Eldho Choorackal, Michela Airoldi, Pier Paolo Riviera, Rossana Bellopede, Ezio Santagata. Performance-Related Assessment of the Potential Use of Sawing Sludge in Cementitious Fluidized Thermal Backfills. Applied Sciences. 2020; 10 (22):8243.
Chicago/Turabian StyleLorena Zichella; Eldho Choorackal; Michela Airoldi; Pier Paolo Riviera; Rossana Bellopede; Ezio Santagata. 2020. "Performance-Related Assessment of the Potential Use of Sawing Sludge in Cementitious Fluidized Thermal Backfills." Applied Sciences 10, no. 22: 8243.
This paper illustrates the results obtained in a study which focused on the mix design and performance-related characterization of rubberized dense-graded mixtures containing a viscosity reduction additive and different percentages of reclaimed asphalt. Following preliminary mix design, plant-produced mixtures were employed for the construction of full-scale trial sections and were subjected to standard quality assurance tests and to advanced mechanical characterization tests. Analysis of results was performed by referring to typical acceptance thresholds and to the outcomes of simplified viscoelastic continuum damage modelling. It was concluded that reclaimed asphalt can have a non-negligible effect on performance properties and that the considered rubberized mixtures, which can be compacted at reduced temperatures, are suitable for paving applications.
Leonardo Urbano; Davide Dalmazzo; Pier Paolo Riviera; Ezio Santagata. Performance Assessment of Rubberized Mixtures Containing Reclaimed Asphalt and a Viscosity Reduction Additive. Lecture Notes in Civil Engineering 2020, 457 -467.
AMA StyleLeonardo Urbano, Davide Dalmazzo, Pier Paolo Riviera, Ezio Santagata. Performance Assessment of Rubberized Mixtures Containing Reclaimed Asphalt and a Viscosity Reduction Additive. Lecture Notes in Civil Engineering. 2020; ():457-467.
Chicago/Turabian StyleLeonardo Urbano; Davide Dalmazzo; Pier Paolo Riviera; Ezio Santagata. 2020. "Performance Assessment of Rubberized Mixtures Containing Reclaimed Asphalt and a Viscosity Reduction Additive." Lecture Notes in Civil Engineering , no. : 457-467.
The study described in this paper focused on the possible use of waste products coming from the production of styrene–butadiene rubber (SBR) and polybutadiene rubber (PBR), as bitumen modifiers. Modified binders containing these products were prepared in the laboratory with different polymer dosages and were thereafter subjected to the evaluation of empirical and rheological properties. For comparative purposes, the study also considered SBR and PBR products of premium quality. Ageing effects were also taken into account by means of proper laboratory simulations. Obtained results indicated that the two types of polymer (SBR and PBR) have completely different effects on the rheology and expected performance of the resulting modified binders. In particular, while the two polymers showed similar effects in terms of resistance to permanent deformation, the SBR products proved to be superior from the viewpoint of fatigue resistance. However, only minor differences were found when comparing the effects produced by premium quality and waste polymers. As a result of the experimental findings, it was concluded that the use of waste SBR polymers can be an attractive solution for the production of affordable modified binders.
Sadegh Yeganeh; Mahmoud Ameri; Davide Dalmazzo; Ezio Santagata. Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification. Applied Sciences 2020, 10, 2671 .
AMA StyleSadegh Yeganeh, Mahmoud Ameri, Davide Dalmazzo, Ezio Santagata. Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification. Applied Sciences. 2020; 10 (8):2671.
Chicago/Turabian StyleSadegh Yeganeh; Mahmoud Ameri; Davide Dalmazzo; Ezio Santagata. 2020. "Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification." Applied Sciences 10, no. 8: 2671.
This paper presents the results of an experimental investigation which focused on self-compacting cement-bound mixtures to be employed for paving applications, especially for pavement foundations in road tunnels. Recipes of the investigated mixtures, which contain reclaimed asphalt pavement material and mineral sludge, were defined by optimizing the packing of the aggregate skeleton and by checking the flowability characteristics of cement pastes and composite mixtures. Long-term stiffness and strength properties were evaluated by means of triaxial and quick shear tests. Based on the obtained results and on their interpretation, a mix design procedure was proposed. General conclusions were drawn with respect to the behaviour of self-compacting cement-bound mixtures and to the possible developments of future research.
Eldho Choorackal; Pier Paolo Riviera; Ezio Santagata. Mix design and mechanical characterization of self-compacting cement-bound mixtures for paving applications. Construction and Building Materials 2019, 229, 116894 .
AMA StyleEldho Choorackal, Pier Paolo Riviera, Ezio Santagata. Mix design and mechanical characterization of self-compacting cement-bound mixtures for paving applications. Construction and Building Materials. 2019; 229 ():116894.
Chicago/Turabian StyleEldho Choorackal; Pier Paolo Riviera; Ezio Santagata. 2019. "Mix design and mechanical characterization of self-compacting cement-bound mixtures for paving applications." Construction and Building Materials 229, no. : 116894.
Ezio Santagata; Orazio Baglieri; Fabrizio Miglietta; Lucia Tsantilis; Pier Paolo Riviera. Impact of nanosized additives on the fatigue damage behaviour of asphalt mixtures. Fatigue & Fracture of Engineering Materials & Structures 2019, 42, 2738 -2746.
AMA StyleEzio Santagata, Orazio Baglieri, Fabrizio Miglietta, Lucia Tsantilis, Pier Paolo Riviera. Impact of nanosized additives on the fatigue damage behaviour of asphalt mixtures. Fatigue & Fracture of Engineering Materials & Structures. 2019; 42 (12):2738-2746.
Chicago/Turabian StyleEzio Santagata; Orazio Baglieri; Fabrizio Miglietta; Lucia Tsantilis; Pier Paolo Riviera. 2019. "Impact of nanosized additives on the fatigue damage behaviour of asphalt mixtures." Fatigue & Fracture of Engineering Materials & Structures 42, no. 12: 2738-2746.
This paper presents the results obtained during a laboratory and field investigation which focused on the assessment of the feasibility of using controlled low strength materials (CLSMs) in pavement foundations of road tunnels. The CLSM considered in the study, which contained a significant amount of recycled asphalt pavement, was designed by optimizing its flowability and by considering its sensitivity to changes in cement dosage. For comparative purposes, a standard low-strength Portland cement concrete mixture was also included in the investigation. Both mixtures were produced in a Portland cement concrete batching plant and were thereafter subjected to laboratory tests for the evaluation of flowability, consistency, compressive strength, California bearing ratio and resilient modulus. Furthermore, full-scale slabs constructed with the two mixtures were subjected to plate loading tests and to the transit of a fully-loaded heavy vehicle. Obtained results indicated that both mixtures are suitable for the formation of pavement foundations since they exhibit a short-term mechanical behavior which is comparable to that of standard granular sub-base materials. However, the CLSM proved to be superior in terms of its improved flowability, easier long-term excavatability, lower production cost and enhanced sustainability. Finally, recommendations for future applications of cement-bound materials in pavement foundations were provided in the form of preliminary performance-based acceptance criteria.
Pier Paolo Riviera; Grazia Bertagnoli; Eldho Choorackal; Ezio Santagata. Controlled low-strength materials for pavement foundations in road tunnels: feasibility study and recommendations. Materials and Structures 2019, 52, 72 .
AMA StylePier Paolo Riviera, Grazia Bertagnoli, Eldho Choorackal, Ezio Santagata. Controlled low-strength materials for pavement foundations in road tunnels: feasibility study and recommendations. Materials and Structures. 2019; 52 (4):72.
Chicago/Turabian StylePier Paolo Riviera; Grazia Bertagnoli; Eldho Choorackal; Ezio Santagata. 2019. "Controlled low-strength materials for pavement foundations in road tunnels: feasibility study and recommendations." Materials and Structures 52, no. 4: 72.
The work presented in this paper focused on the rheological properties of ternary composites for paving applications constituted by bitumen, nano-sized additives and polymer modifiers. Non-functionalized multiwall carbon nanotubes and two types of styrene-butadienestyrene polymers, linear and radial, were used to modify a reference neat bitumen with the specific goal of highlighting the effects of polymer structure on the final properties of composites. Binary blends containing a single additive were also investigated for comparative purposes. Materials were characterized by means of dynamic mechanical analysis and their internal structure was assessed with fluorescence microscopy observations. Experimental outcomes indicated that polymer architecture played a crucial role in promoting effective interactions between modifiers and carbon nanotubes. Specifically, in the presence of linear styrene-butadienestyrene, carbon nanotubes acted as compatibility activators, leading to the formation of stable and continuous ternary systems. On the contrary, in the case of radial styrene-butadienestyrene, beneficial effects provided by nano-modification were jeopardized by the increased thermodynamic instability which resulted from the combined use of these two components.
Lucia Tsantilis; Davide Dalmazzo; Orazio Baglieri; Ezio Santagata. Effect of SBS molecular structure on the rheological properties of ternary nanomodified bituminous binders. Construction and Building Materials 2019, 222, 183 -192.
AMA StyleLucia Tsantilis, Davide Dalmazzo, Orazio Baglieri, Ezio Santagata. Effect of SBS molecular structure on the rheological properties of ternary nanomodified bituminous binders. Construction and Building Materials. 2019; 222 ():183-192.
Chicago/Turabian StyleLucia Tsantilis; Davide Dalmazzo; Orazio Baglieri; Ezio Santagata. 2019. "Effect of SBS molecular structure on the rheological properties of ternary nanomodified bituminous binders." Construction and Building Materials 222, no. : 183-192.
This paper presents some of the results obtained in a research project focused on the use of paint sludge (PS) as a modifying agent in the production of bituminous binders for paving applications. The scope of the project was to provide an innovative, sustainable and profitable solution to waste management problems which automotive industries have to face worldwide as a result of the production of PS. The authors applied for a patent which defines the industrial process for the production of PS modified binders (PSMBs). Measurements and analyses which were considered relevant for the assessment of technological feasibility included evaluation of: PS physical characteristics, PSMB high-temperature viscosity and PSMB storage stability. Environmental issues were addressed by considering PS chemical composition, gaseous emissions during PSMB production, and leaching behavior of bituminous mixtures containing PSMBs. Obtained results show that with a proper adaptation of the PSMB production process (i.e., PS drying at a higher temperature than 105°C) it is possible to comply with technological and environmental requirements such as those related to storage stability and to gaseous emissions during PSMB production and laying of bituminous mixtures. Leaching tests, aimed to evaluate runoff water quality, show no substantial difference in the release of substances in water between standard bituminous mixtures and bituminous mixtures prepared with PSMBs.
Maria Chiara Zanetti; Barbara Ruffino; Arianna Vercelli; Davide Dalmazzo; Ezio Santagata. Reuse of paint sludge in road pavements: Technological and environmental issues. Waste Management & Research: The Journal for a Sustainable Circular Economy 2018, 36, 1023 -1028.
AMA StyleMaria Chiara Zanetti, Barbara Ruffino, Arianna Vercelli, Davide Dalmazzo, Ezio Santagata. Reuse of paint sludge in road pavements: Technological and environmental issues. Waste Management & Research: The Journal for a Sustainable Circular Economy. 2018; 36 (11):1023-1028.
Chicago/Turabian StyleMaria Chiara Zanetti; Barbara Ruffino; Arianna Vercelli; Davide Dalmazzo; Ezio Santagata. 2018. "Reuse of paint sludge in road pavements: Technological and environmental issues." Waste Management & Research: The Journal for a Sustainable Circular Economy 36, no. 11: 1023-1028.
A simplified viscoelastic continuum damage model was adopted to analyze experimental data obtained from healing tests consisting of continuous shear loading interrupted by single rest periods. Tests were conducted on various bituminous binders with the purpose of highlighting the aptitude of the proposed methodology in discriminating and ranking their healing potential. Healing was quantitatively assessed by introducing two indicators (HRC and HRS) derived from damage characteristic functions. Results revealed the existence of some irreversible damage after continuous shear loading. In addition, even though polymer modification enhances healing properties of base bitumen, in some cases neat binders may outperform polymer-modified binders.
Orazio Baglieri; Lucia Tsantilis; Ezio Santagata. Evaluation of healing potential of bituminous binders using a viscoelastic continuum damage approach. Construction and Building Materials 2018, 184, 344 -350.
AMA StyleOrazio Baglieri, Lucia Tsantilis, Ezio Santagata. Evaluation of healing potential of bituminous binders using a viscoelastic continuum damage approach. Construction and Building Materials. 2018; 184 ():344-350.
Chicago/Turabian StyleOrazio Baglieri; Lucia Tsantilis; Ezio Santagata. 2018. "Evaluation of healing potential of bituminous binders using a viscoelastic continuum damage approach." Construction and Building Materials 184, no. : 344-350.
The experimental investigation described in this paper focused on the effects of nanoclays on the fatigue behaviour of bituminous mixtures. Damage characteristics of a bituminous mixture produced by making use of a nano-reinforced binder were compared to those of a reference mixture obtained by employing the same neat bitumen used as a base in the preparation of the nanoclay–bitumen blend. Dynamic modulus tests and direct tension cyclic fatigue tests were carried out to determine the linear viscoelastic properties and the damage evolution characteristics of materials. Corresponding results were modelled by means of a viscoelastic continuum damage approach and by making use of a more empirical evaluation based on the classical Wöhler representation. It was found that the use of nanoclays produced a reinforcement of bituminous mixtures, the benefits of which were observed both in the progression of damage and in the occurrence of ultimate failure conditions.
Fabrizio Miglietta; Benjamin Underwood; Lucia Tsantilis; Orazio Baglieri; Kamil E. Kaloush; Ezio Santagata. Fatigue properties of nano-reinforced bituminous mixtures: A viscoelastic continuum damage approach. International Journal of Pavement Research and Technology 2018, 1 .
AMA StyleFabrizio Miglietta, Benjamin Underwood, Lucia Tsantilis, Orazio Baglieri, Kamil E. Kaloush, Ezio Santagata. Fatigue properties of nano-reinforced bituminous mixtures: A viscoelastic continuum damage approach. International Journal of Pavement Research and Technology. 2018; ():1.
Chicago/Turabian StyleFabrizio Miglietta; Benjamin Underwood; Lucia Tsantilis; Orazio Baglieri; Kamil E. Kaloush; Ezio Santagata. 2018. "Fatigue properties of nano-reinforced bituminous mixtures: A viscoelastic continuum damage approach." International Journal of Pavement Research and Technology , no. : 1.
This paper focuses on low-temperature performance of bituminous nanocomposites for road paving applications. In the experimental investigation, one type of carbon nanotubes and two types of nanoclays were combined with three base bitumens at various dosages by following a protocol based on the use of shear mixing and sonication. All rheological measurements were carried out by means of a Bending Beam Rheometer at temperatures comprised between −6 and −24 °C. Results, which were interpreted by combining different analysis models, showed that the effectiveness of nano-modification is strictly influenced by the combination of base binder, additive type and dosage.
Lucia Tsantilis; Orazio Baglieri; Ezio Santagata. Low-temperature properties of bituminous nanocomposites for road applications. Construction and Building Materials 2018, 171, 397 -403.
AMA StyleLucia Tsantilis, Orazio Baglieri, Ezio Santagata. Low-temperature properties of bituminous nanocomposites for road applications. Construction and Building Materials. 2018; 171 ():397-403.
Chicago/Turabian StyleLucia Tsantilis; Orazio Baglieri; Ezio Santagata. 2018. "Low-temperature properties of bituminous nanocomposites for road applications." Construction and Building Materials 171, no. : 397-403.
The study focused on two new laboratory procedures developed for the determination of crumb rubber content of asphalt rubber binders. The first methodology was on the basis of the comparative analysis of cobalt and antimony content of base bitumen, crumb rubber, and asphalt rubber. The second was on the basis of the analysis of combustion products of asphalt rubber binders and of their components. Investigations were performed on binders prepared in the laboratory or sampled at production plants during pavement rehabilitation works. Obtained results were encouraging because it was found that both procedures were characterized by satisfactory levels of accuracy and precision.
Maria Chiara Zanetti; Barbara Ruffino; Davide Dalmazzo; Michele Lanotte; Ezio Santagata. Determination of Crumb Rubber Content of Asphalt Rubber Binders. Journal of Materials in Civil Engineering 2018, 30, 04018041 .
AMA StyleMaria Chiara Zanetti, Barbara Ruffino, Davide Dalmazzo, Michele Lanotte, Ezio Santagata. Determination of Crumb Rubber Content of Asphalt Rubber Binders. Journal of Materials in Civil Engineering. 2018; 30 (4):04018041.
Chicago/Turabian StyleMaria Chiara Zanetti; Barbara Ruffino; Davide Dalmazzo; Michele Lanotte; Ezio Santagata. 2018. "Determination of Crumb Rubber Content of Asphalt Rubber Binders." Journal of Materials in Civil Engineering 30, no. 4: 04018041.
The paper reports the results of an experimental investigation in which the cohesive healing properties of different types of asphalt binder were evaluated by means of the dissipated energy ratio approach. A specifically designed testing methodology was proposed which involves comparing the response of binders subjected to continuous oscillatory shear loading carried out without rest periods and with single rest periods introduced at predefined levels of damage A rheological parameter (Healing Ratio) was introduced to quantify the magnitude of healing occurring during rest time and to rank the consequent healing potential of binders. Obtained results indicate that the investigated binders did not completely recover their original fatigue resistance after rest time, confirming the existence of some intrinsic irreversible damage, the amount of which depends on the total damage experienced before load removal. Experimental results also indicate that healing performance of binders can be significantly enhanced by polymer modificatio
Ezio Santagata; Orazio Baglieri; Davide Dalmazzo; Lucia Tsantilis. Investigating cohesive healing of asphalt binders by means of a dissipated energy approach. International Journal of Pavement Research and Technology 2017, 10, 403 -409.
AMA StyleEzio Santagata, Orazio Baglieri, Davide Dalmazzo, Lucia Tsantilis. Investigating cohesive healing of asphalt binders by means of a dissipated energy approach. International Journal of Pavement Research and Technology. 2017; 10 (5):403-409.
Chicago/Turabian StyleEzio Santagata; Orazio Baglieri; Davide Dalmazzo; Lucia Tsantilis. 2017. "Investigating cohesive healing of asphalt binders by means of a dissipated energy approach." International Journal of Pavement Research and Technology 10, no. 5: 403-409.
A three-parameter fractional model, composed by a springpot in series with a dapshpot, was employed to describe the rheological behaviour of a set of polymer-modified bituminous binders obtained by combining a single-base bitumen with different types of syrene-butadiene-styrene copolymers at different concentrations. Experimental strain-time curves gathered from creep-recovery shear tests carried out by means of a dynamic shear rheometer at various temperatures were found to be in good agreement with model predictions. The fractional approach leads to a synthetic yet exhaustive description of the viscoelastic behavior of all materials. Variation of model parameters, each of which with a precise physical meaning, appears to be coherent with different binder compositions and testing conditions, reflecting the variations in terms of polymer concentration and temperature.
Orazio Baglieri; Ezio Santagata; Alberto Sapora; Pietro Cornetti; Alberto Carpinteri. Fractional Viscoelastic Modeling of Antirutting Response of Bituminous Binders. Journal of Engineering Mechanics 2017, 143, 1 .
AMA StyleOrazio Baglieri, Ezio Santagata, Alberto Sapora, Pietro Cornetti, Alberto Carpinteri. Fractional Viscoelastic Modeling of Antirutting Response of Bituminous Binders. Journal of Engineering Mechanics. 2017; 143 (5):1.
Chicago/Turabian StyleOrazio Baglieri; Ezio Santagata; Alberto Sapora; Pietro Cornetti; Alberto Carpinteri. 2017. "Fractional Viscoelastic Modeling of Antirutting Response of Bituminous Binders." Journal of Engineering Mechanics 143, no. 5: 1.
This paper presents the outcomes of an experimental investigation which focused on the fatigue behavior of bituminous binder for paving applications prepared by
Davide Dalmazzo; Ezio Santagata; Lucia Tsantilis. Fatigue Characterization of Bituminous Binders Containing Crumb Rubber from End of Life Tires. Sixth International Conference on Advances in Civil, Structural and Mechanical Engineering - ACSM 2017 2017, 51 -56.
AMA StyleDavide Dalmazzo, Ezio Santagata, Lucia Tsantilis. Fatigue Characterization of Bituminous Binders Containing Crumb Rubber from End of Life Tires. Sixth International Conference on Advances in Civil, Structural and Mechanical Engineering - ACSM 2017. 2017; ():51-56.
Chicago/Turabian StyleDavide Dalmazzo; Ezio Santagata; Lucia Tsantilis. 2017. "Fatigue Characterization of Bituminous Binders Containing Crumb Rubber from End of Life Tires." Sixth International Conference on Advances in Civil, Structural and Mechanical Engineering - ACSM 2017 , no. : 51-56.