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Dr. Davide Lo Presti
Nottingham Transportation Engineering Centre, University of Nottingham, Room C11, Pavement Research Building, University Park, Nottingham, NG7 2RD, UK

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0 Asphalt
0 Bitumen
0 Life Cycle Assessment
0 Recycling
0 Sustainability

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Asphalt
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Road pavements
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Journal article
Published: 13 July 2021 in Road Materials and Pavement Design
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Stone Mastic Asphalt (SMA) has been broadly used on heavily trafficked roads and motorways in the UK due to its known stability and durability. In this study, several sets of SMA mixtures were produced using different rubberised bitumens, including a Fischer–Tropsch wax pre-treated rubberised bitumen. Properties associated with rutting were evaluated using both linear and nonlinear viscoelastic analyses, using different test methods such as the Strategic Highway Research Programme (SHRP), Shenoy rutting parameter, zero shear viscosity (ZSV) and multiple stress creep recovery (MSCR) tests. The rutting resistance of the resulting SMA mixtures was assessed using the Repeated Load Axial Test (RLAT). The addition of rubber was expected to enhance rutting resistance of these materials. The results indicated that among the binder rutting parameters assessed, the non-recoverable creep compliance (Jnr) computed from the MSCR test, showed the best correlation with the rutting resistance of the corresponding asphalt mixtures. Finally, a more fundamental analysis was provided by assessing the conditions of binder films that would be experienced in the mixtures. Highlights

ACS Style

Ayad Subhy; Davide Lo Presti; Gordon Airey; Iswandaru Widyatmoko. Rutting analysis of different rubberised stone mastic asphalt mixtures: from binders to mixtures. Road Materials and Pavement Design 2021, 1 -17.

AMA Style

Ayad Subhy, Davide Lo Presti, Gordon Airey, Iswandaru Widyatmoko. Rutting analysis of different rubberised stone mastic asphalt mixtures: from binders to mixtures. Road Materials and Pavement Design. 2021; ():1-17.

Chicago/Turabian Style

Ayad Subhy; Davide Lo Presti; Gordon Airey; Iswandaru Widyatmoko. 2021. "Rutting analysis of different rubberised stone mastic asphalt mixtures: from binders to mixtures." Road Materials and Pavement Design , no. : 1-17.

Research article
Published: 30 March 2021 in Road Materials and Pavement Design
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The performance of cold bitumen emulsion (CBE) mixtures is strongly linked to an optimised design of the binder blends and mastics. Types and dosages of bitumen, mineral additions and the workability must be characterised and optimised. This study aims at providing an approach for the fundamental characterisation of CBE materials using rotational viscometry. Firstly, a procedure for measuring the viscosity of CBE slurries using the Brookfield viscometer was investigated by comparing results obtained by using a traditional spindle geometry and a novel impeller engineered to avoid phase separation: the dual helical ribbon (DHR). Afterwards, the effect of mineral additions and bitumen emulsions types was measured and modelled, also considering the influence of their concentration. The Krieger-Dougherty model proved to be a powerful tool to fit results and provide fundamental parameters for improved CBE materials engineering characterisation. Overall, the DHR was found a promising tool for CBE slurries rheological characterisation.

ACS Style

Chiara Mignini; Davide Lo Presti; Gordon Airey; Andrea Graziani. Rheological characterisation of cold bitumen emulsion slurries. Road Materials and Pavement Design 2021, 22, S232 -S250.

AMA Style

Chiara Mignini, Davide Lo Presti, Gordon Airey, Andrea Graziani. Rheological characterisation of cold bitumen emulsion slurries. Road Materials and Pavement Design. 2021; 22 (sup1):S232-S250.

Chicago/Turabian Style

Chiara Mignini; Davide Lo Presti; Gordon Airey; Andrea Graziani. 2021. "Rheological characterisation of cold bitumen emulsion slurries." Road Materials and Pavement Design 22, no. sup1: S232-S250.

Journal article
Published: 11 March 2021 in Construction and Building Materials
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Microwave heating treatments for assisted self-healing of asphalt mixtures have been investigated over the last years. However, the only heating treatment does not permit to recover the entire original strength of the asphalt mixtures. The experimental results of this investigation show that the combination of heating and re-compacting of the pavement (thermomechanical treatment) can overcome these limitations, restoring the original tensile strength of the mixtures. During the investigation, an innovative type of mold for the gyratory compactor has been developed. The peculiarity of the mold is that it can be longitudinally opened and closed through the use of hex screw heads. Thanks to this two-parts mold, the previously broken specimen can be easily reintroduced into the mold to be subjected to new cycles of re-compaction with the kneading effect of the gyratory compactor. The experiment done in this investigation was carried out on asphalt mortars with steel fibers or electric arc furnace slag. The results showed that the additives and the re-compaction technique reduce drastically the heating energy necessary to assist self-healing of the mortars. This thermomechanical treatment could be implemented in the field by heating the deteriorated pavement with a microwave generator, and then re-compacting the pavement with a rolling compactor, which can promote the healing process thanks to its kneading action on the heated pavement.

ACS Style

Juan Gallego; Federico Gulisano; Verónica Contreras; Antonio Páez. The crucial effect of re-compaction energy on the healing response of hot asphalt mortars heated by microwaves. Construction and Building Materials 2021, 285, 122861 .

AMA Style

Juan Gallego, Federico Gulisano, Verónica Contreras, Antonio Páez. The crucial effect of re-compaction energy on the healing response of hot asphalt mortars heated by microwaves. Construction and Building Materials. 2021; 285 ():122861.

Chicago/Turabian Style

Juan Gallego; Federico Gulisano; Verónica Contreras; Antonio Páez. 2021. "The crucial effect of re-compaction energy on the healing response of hot asphalt mortars heated by microwaves." Construction and Building Materials 285, no. : 122861.

Journal article
Published: 09 March 2021 in Materials
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Compaction of cold asphalt mixtures is a subject that has not been thoroughly studied, and, for this reason, requires new efforts from researchers to have a better understanding. Unlike hot mixtures, cold mixtures and mainly recycled mixtures require specific considerations for compaction. There is a lack of consensus about the methodology to select the optimum premix water and emulsion contents. In the absence of specific regulations, the use of soil tests or hot mixtures procedures is common. For these reasons, this investigation’s main goal was to evaluate two compaction methods used to design cold recycled mixtures with emulsion: the modified Proctor procedure and the gyratory compaction. It was concluded that both methods could be useful to study compactability since consistent results were obtained by applying the maximum bulk density criterion. However, the higher bulk densities achieved, the smaller specimens used, and the suitability of the gyratory specimens to be later tested for mechanical properties make them preferable to the modified Proctor samples. A new approach has been proposed using iso-density lines on dual-axis premix water content-emulsion content graphs that facilitates the study of the influence on compactability of these two factors combined. These contributions can alleviate the laboratory works during the design of cold recycled asphalt mixtures and contribute to a more in-depth knowledge of the combined effect of premix water and emulsion contents on the compactability of cold recycled mixtures with emulsion.

ACS Style

Guillermo Flores; Juan Gallego; Lucía Miranda; José Marcobal. Influence of the Compaction Method in the Volumetric Design of Cold Recycled Mixtures with Emulsion. Materials 2021, 14, 1309 .

AMA Style

Guillermo Flores, Juan Gallego, Lucía Miranda, José Marcobal. Influence of the Compaction Method in the Volumetric Design of Cold Recycled Mixtures with Emulsion. Materials. 2021; 14 (5):1309.

Chicago/Turabian Style

Guillermo Flores; Juan Gallego; Lucía Miranda; José Marcobal. 2021. "Influence of the Compaction Method in the Volumetric Design of Cold Recycled Mixtures with Emulsion." Materials 14, no. 5: 1309.

Journal article
Published: 05 February 2021 in Construction and Building Materials
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Microwave heating could contribute to the sustainability of several operations in the construction and maintenance of asphalt pavements. This paper aims at describing the current status of this technology and pointing out the next steps to promote its spreading in the asphalt industry. According to this investigation, asphalt binders are not susceptible to microwaves, but some types of aggregates remarkably promote the heating process. The addition of steel slag, metallic fibers or carbon nanomaterials can also enhance energy efficiency. Nevertheless, the lack of laboratory standardization and the need for full-scale equipment and projects can slow the use of this technology.

ACS Style

Federico Gulisano; Juan Gallego. Microwave heating of asphalt paving materials: Principles, current status and next steps. Construction and Building Materials 2021, 278, 121993 .

AMA Style

Federico Gulisano, Juan Gallego. Microwave heating of asphalt paving materials: Principles, current status and next steps. Construction and Building Materials. 2021; 278 ():121993.

Chicago/Turabian Style

Federico Gulisano; Juan Gallego. 2021. "Microwave heating of asphalt paving materials: Principles, current status and next steps." Construction and Building Materials 278, no. : 121993.

Review
Published: 02 September 2020 in Sustainability
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The pavement engineering industry, having realized the significance of the impacts that it imposes on the environment through the production, construction and management of its products and assets, has been driven towards a more sustainable and circular way of operating. This has partly been through asphalt recycling, which is an area that many road authorities have prioritized. However, not all the National Road Authorities (NRAs) and/or sector stakeholders seem to be adequately familiar with the Circular Economy (CE) concept. This paper attempts to assist the transition of NRAs to a more circular way of doing business, by analyzing the current situation of CE within national/regional authorities and NRAs. To do so, a questionnaire was sent to different NRAs and an online search was conducted to identify the ways that NRAs communicate their CE practices. Findings indicate that, although the majority of the NRAs are familiar with CE as a concept, not many actions have been taken so far towards its holistic implementation. Finally, there is a significant lack of CE expertise and communication within these bodies.

ACS Style

Konstantinos Mantalovas; Gaetano Di Mino; Ana Jimenez Del Barco Carrion; Elisabeth Keijzer; Björn Kalman; Tony Parry; Davide Lo Presti. European National Road Authorities and Circular Economy: An Insight into Their Approaches. Sustainability 2020, 12, 7160 .

AMA Style

Konstantinos Mantalovas, Gaetano Di Mino, Ana Jimenez Del Barco Carrion, Elisabeth Keijzer, Björn Kalman, Tony Parry, Davide Lo Presti. European National Road Authorities and Circular Economy: An Insight into Their Approaches. Sustainability. 2020; 12 (17):7160.

Chicago/Turabian Style

Konstantinos Mantalovas; Gaetano Di Mino; Ana Jimenez Del Barco Carrion; Elisabeth Keijzer; Björn Kalman; Tony Parry; Davide Lo Presti. 2020. "European National Road Authorities and Circular Economy: An Insight into Their Approaches." Sustainability 12, no. 17: 7160.

Conference paper
Published: 26 August 2020 in Lecture Notes in Civil Engineering
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This research presents a novel performance-based interpretation method for continuous monitoring of pavement condition through the use of piezoelectric sensors. The objective of this study is to validate the compressed cumulative loading event approach, implemented in a previously developed piezoelectric sensor, for detecting subsurface fatigue cracking through full-scale accelerated pavement testing. A piezo-electric film of polyvinylidene fluoride is used to harvest the microstrain energy induced by the traffic loading at the surface. Epoxy is used to protect the sensor following a H-shape packaging. Piezoelectric sensors were exposed to approximately 1.0 million load repetitions between November 2017 and February 2018 at the IFSTTAR carrousel in Nantes, France. Reference strain measurements were recorded with two types of commercial strain gauge. Results from the full-scale test have successfully validated the novel approach for detecting subsurface cracking in asphalt concrete pavements. Finally, the piezoelectric sensors were able to detect damage progression and severity through the number of open threshold levels.

ACS Style

Mario Manosalvas-Paredes; Nizar Lajnef; Karim Chatti; Juliette Blanc; Nick Thom; Gordon Airey; Davide Lo Presti. Monitoring Road Pavement Performance Through a Novel Data Processing Approach, Accelerated Pavement Test Results. Lecture Notes in Civil Engineering 2020, 545 -554.

AMA Style

Mario Manosalvas-Paredes, Nizar Lajnef, Karim Chatti, Juliette Blanc, Nick Thom, Gordon Airey, Davide Lo Presti. Monitoring Road Pavement Performance Through a Novel Data Processing Approach, Accelerated Pavement Test Results. Lecture Notes in Civil Engineering. 2020; ():545-554.

Chicago/Turabian Style

Mario Manosalvas-Paredes; Nizar Lajnef; Karim Chatti; Juliette Blanc; Nick Thom; Gordon Airey; Davide Lo Presti. 2020. "Monitoring Road Pavement Performance Through a Novel Data Processing Approach, Accelerated Pavement Test Results." Lecture Notes in Civil Engineering , no. : 545-554.

Journal article
Published: 30 May 2020 in Materials
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Nowadays, the self-healing of asphalt pavements promoted by microwave radiation heating energy is gaining attention and strength in the scientific community. However, most of these studies are only conceptual and, thus, remain shrouded in uncertainty regarding technology development, economy, and application effect. Therefore, there are several efforts underway to offer more effective assisted healing treatments that are capable of overcoming such uncertainties. This paper aims to assess and quantify the healing performance rates (HR) of half-warm recycled asphalt (HWRA) mixtures containing electric arc furnace (EAF) slag and total recycled asphalt pavement (RAP) rates. To this end, a novel assisted thermomechanical healing treatment (i.e., a recompaction-based technique and microwave heating energy) was put forward to promote the potential healing effect of this treatment on the mechanical properties of the asphalt mixtures. In order to do this, three microwave heating temperatures (25 °C, 60 °C, and 80 °C) and three mechanical recompaction levels (0, 25, and 50 gyrations) were selected. After that, the healing performance rates (%, HR) of the asphalt mixtures were calculated by repeated indirect tensile strength (ITS) and indirect tensile stiffness modulus (ITSM). The results indicated that the 8% EAF slag mixture was found to provide significant microwave heating energy savings by up to 69% compared with the benchmark 100% RAP mixture, and, at the same time, it experienced a remarkable stiffness recovery response of 140% of the initial mechanical properties. These findings encourage greater confidence in promoting this innovative thermomechanical-based healing treatment for in-situ surface course asphalt mixtures of road pavements.

ACS Style

José Manuel Lizárraga; Juan Gallego. Self-Healing Analysis of Half-Warm Asphalt Mixes Containing Electric Arc Furnace (EAF) Slag and Reclaimed Asphalt Pavement (RAP) Using a Novel Thermomechanical Healing Treatment. Materials 2020, 13, 2502 .

AMA Style

José Manuel Lizárraga, Juan Gallego. Self-Healing Analysis of Half-Warm Asphalt Mixes Containing Electric Arc Furnace (EAF) Slag and Reclaimed Asphalt Pavement (RAP) Using a Novel Thermomechanical Healing Treatment. Materials. 2020; 13 (11):2502.

Chicago/Turabian Style

José Manuel Lizárraga; Juan Gallego. 2020. "Self-Healing Analysis of Half-Warm Asphalt Mixes Containing Electric Arc Furnace (EAF) Slag and Reclaimed Asphalt Pavement (RAP) Using a Novel Thermomechanical Healing Treatment." Materials 13, no. 11: 2502.

Journal article
Published: 29 April 2020 in Materials and Structures
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Thermo-rheological characteristics of unmodified and modified bitumen have significant impacts on the mechanical response of asphalt. This study investigates the impacts of an organic and a chemical Warm Mix Asphalt additive on bitumen thermo-rheological and mechanical characteristics. Modified binders with different concentrations of each additive were studied and analysed comparatively to a 40/60 penetration grade bitumen. Frequency sweep tests were performed at different ageing levels to characterise the Linear Viscoelastic properties. The multiple stress creep and recovery, linear amplitude sweep (LAS) and low temperature creep stiffness tests, together with the Glover–Rowe (G–R) fatigue parameter (determined from fitting of the 2S2P1D model to the complex shear modulus and phase angle master curves) were used to analyse the performance of the binders at critical operating temperatures. The results demonstrated the necessity to analyse the behavior of the studied binders beyond the limits of linear viscoelasticity to better characterise these types of bitumen. The results also indicated that both additives retarded bitumen ageing with the organic additive increasing bitumen elastic response while the chemical additive increased its viscous response. The results also showed an excellent correlation between the G–R parameter and LAS results which suggests the ability to use this parameter in characterising fatigue performance of the studied binders. This also suggests that bitumen fatigue life may be improving over time due to the increased elastic behahviour during ageing so long as a certain critical level of ageing is not reached.

ACS Style

Ahmed Abed; Nick Thom; Davide Lo Presti; Gordon Airey. Thermo-rheological analysis of WMA-additive modified binders. Materials and Structures 2020, 53, 1 .

AMA Style

Ahmed Abed, Nick Thom, Davide Lo Presti, Gordon Airey. Thermo-rheological analysis of WMA-additive modified binders. Materials and Structures. 2020; 53 (3):1.

Chicago/Turabian Style

Ahmed Abed; Nick Thom; Davide Lo Presti; Gordon Airey. 2020. "Thermo-rheological analysis of WMA-additive modified binders." Materials and Structures 53, no. 3: 1.

Journal article
Published: 22 April 2020 in Construction and Building Materials
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Polymer Modified Bitumens (PMBs) are largely used for pavement and roofing membranes applications with Styrene-Butadiene-Styrene Block copolymer (SBS) playing a major role in both markets despite its constantly increasing price due to the rising demand for quality bitumen modifiers. On the other hand, there is an increasing trend of recycling end of life tyres generating Recycled Tyre Rubber (RTR) at affordable price. This investigation aims at engineering a modified bitumen with a combination of Liquid Rubber (LR), a homogeneous blend of 50–70% RTR pre-processed in combination with heavy oils, and a wax denominated Ethylene Bis Stearamide (EBS). In the first phase, the effect of LR and EBS was independently characterised and compared to PMBs. Next, the Response Surface Methodology (RSM) was used to predict the response of different combinations of LR and EBS in terms of low and high temperature properties and cost, to then be optimised targeting conventional and rheological properties of PMBs currently used in asphalt mixtures and roofing membranes in UK. As a result, an optimum combination of LR and EBS was found leading to a cost-effective modified bitumen comparable to PMBs. The work provided also analytical functions that could be of use in further design exercises.

ACS Style

Ana Jiménez Del Barco Carrión; Ayad Subhy; Maria Angeles Izquierdo Rodriguez; Davide Lo Presti. Optimisation of liquid rubber modified bitumen for road pavements and roofing applications. Construction and Building Materials 2020, 249, 118630 .

AMA Style

Ana Jiménez Del Barco Carrión, Ayad Subhy, Maria Angeles Izquierdo Rodriguez, Davide Lo Presti. Optimisation of liquid rubber modified bitumen for road pavements and roofing applications. Construction and Building Materials. 2020; 249 ():118630.

Chicago/Turabian Style

Ana Jiménez Del Barco Carrión; Ayad Subhy; Maria Angeles Izquierdo Rodriguez; Davide Lo Presti. 2020. "Optimisation of liquid rubber modified bitumen for road pavements and roofing applications." Construction and Building Materials 249, no. : 118630.

Journal article
Published: 30 March 2020 in Construction and Building Materials
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The present work aims at determining the conditions for the compaction of cold recycled mixtures with emulsion and 100% RAP. Additionally, the influence of the emulsion and cement on the final properties of the recycled mixtures has been investigated. To achieve these purposes, reclaimed asphalt material coming from the milling of a distressed pavement was mixed with different proportions of water, asphalt emulsion and cement. The mixtures were compacted by a gyratory compactor. As a result of the investigation, it is recommended to apply a compaction energy level of 100 gyrations for specimens 100 mm diameter and 60 mm height, and an energy of 200 gyrations for specimens 100 mm diameter and 100 mm height. As for the mechanical properties of the mixtures, the laboratory tests showed that the presence of cement contributes to improving the sensitivity to water attack, the resistance to permanent deformations, the stiffness modulus and the fatigue life of the mixtures.

ACS Style

Guillermo Flores; Juan Gallego; Lucía Miranda; José Ramón Marcobal. Cold asphalt mix with emulsion and 100% rap: Compaction energy and influence of emulsion and cement content. Construction and Building Materials 2020, 250, 118804 .

AMA Style

Guillermo Flores, Juan Gallego, Lucía Miranda, José Ramón Marcobal. Cold asphalt mix with emulsion and 100% rap: Compaction energy and influence of emulsion and cement content. Construction and Building Materials. 2020; 250 ():118804.

Chicago/Turabian Style

Guillermo Flores; Juan Gallego; Lucía Miranda; José Ramón Marcobal. 2020. "Cold asphalt mix with emulsion and 100% rap: Compaction energy and influence of emulsion and cement content." Construction and Building Materials 250, no. : 118804.

Journal article
Published: 20 March 2020 in Transportation Research Procedia
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Rigid pavements have widespread use, e.g, in motorways and airports, due to their excellent properties such as high bearing capacity and long lifetime. However, when rigid pavements fail it is often due to bad load transfer efficiency (LTE) at its joints. Traditional methods of measuring LTE can be time consuming. Here, we study the possibility of measuring LTE using a moving load with the aim of achieving higher productivity. An experiment simulating Rolling Weight Deflectometer (RWD) measurements on a joint was carried out to gain understanding and confidence that can guide the analysis of real RWD data. Continuous data from measurements across a joint allows for determination of not only the LTE but also additional parameters characterizing the pavement and the joint. A semi-analytical model was implemented for simulating the pavement response next to a joint and used for interpretation and verification of the experimental data. The results show promise for the use of moving loads for rapid evaluation of joints.

ACS Style

Pawan Deep; Mathias B. Andersen; Søren Rasmussen; Nick Thom; Alessandro Marradi; Davide Lo Presti. Evaluation of Load transfer in rigid pavements by Rolling wheel deflectometer and Falling weight deflectometer. Transportation Research Procedia 2020, 45, 376 -383.

AMA Style

Pawan Deep, Mathias B. Andersen, Søren Rasmussen, Nick Thom, Alessandro Marradi, Davide Lo Presti. Evaluation of Load transfer in rigid pavements by Rolling wheel deflectometer and Falling weight deflectometer. Transportation Research Procedia. 2020; 45 ():376-383.

Chicago/Turabian Style

Pawan Deep; Mathias B. Andersen; Søren Rasmussen; Nick Thom; Alessandro Marradi; Davide Lo Presti. 2020. "Evaluation of Load transfer in rigid pavements by Rolling wheel deflectometer and Falling weight deflectometer." Transportation Research Procedia 45, no. : 376-383.

Journal article
Published: 20 February 2020 in Applied Sciences
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Pavement preventive maintenance is an important tool for extending the service life of the road pavements. Microwave heating seems to be a promising technology for this application, as bituminous materials have the potential to self-repair above a certain temperature. As ordinary asphalt mixture has low microwave absorbing properties, some additives should be used to improve the heating efficiency. In this paper, the effect of adding Electric Arc Furnace (EAF) slag and Graphene Nanoplatelets (GNPs) on the microwave heating and healing efficiency of asphalt mixtures was evaluated. Microwave heating efficiency was assessed by heating the specimens using several heating times. In addition, the electrical resistivity of the mixtures was measured to understand its possible relationship with the microwave heating process. Furthermore, the healing rates of the asphalt mixtures were assessed by repeated Indirect Tensile Strength (ITS) tests. The results obtained indicate that the additions of graphene and EAF slag can allow important savings, up to 50%, on the energy required to perform a good healing process.

ACS Style

Federico Gulisano; João Crucho; Juan Gallego; Luis Picado-Santos. Microwave Healing Performance of Asphalt Mixture Containing Electric Arc Furnace (EAF) Slag and Graphene Nanoplatelets (GNPs). Applied Sciences 2020, 10, 1428 .

AMA Style

Federico Gulisano, João Crucho, Juan Gallego, Luis Picado-Santos. Microwave Healing Performance of Asphalt Mixture Containing Electric Arc Furnace (EAF) Slag and Graphene Nanoplatelets (GNPs). Applied Sciences. 2020; 10 (4):1428.

Chicago/Turabian Style

Federico Gulisano; João Crucho; Juan Gallego; Luis Picado-Santos. 2020. "Microwave Healing Performance of Asphalt Mixture Containing Electric Arc Furnace (EAF) Slag and Graphene Nanoplatelets (GNPs)." Applied Sciences 10, no. 4: 1428.

Articles
Published: 20 February 2020 in Road Materials and Pavement Design
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Modified bituminous binders allow asphalt technologists to design asphalt mixtures with superior performance. However, several recent studies highlighted that due to the complexity of these material, their characterisation can be challenging since common procedures used to characterise neat bitumen might not be adequate. For instance, during high temperature rotational viscosity testing of recycled tyre rubber modified binders (RTR-MB), a number of changes may occur to the sample leading to the here-defined sample stability which in turn provides misleading results. In this study the authors want to first provide a deeper understanding of this phenomenon by a numerical analysis using a bespoke Computational Fluid Dynamics (CFD) model to simulate the laboratory tests and use innovative visual aids to monitor the sample stability of heterogeneous bituminous binders during the rotational test. The numerical analysis was complemented by a laboratory campaign aiming at proving the occurring of sample stability during viscosity measurement of heterogeneous bituminous binders with a standard testing setup (SC-27). Furthermore, a dual helical ribbon (DHR) is here introduced as a solution to overcome the issue. Hence, laboratory tests were undertaken also with DHR and differences in viscosity measurements of neat bitumen, SBS-MB and RTR-MB were recorded. Results of this combined numerical and empirical approach proved that the standard setup for rotational viscosity measurements seems not be adequate for RTR-MB and depending on the level of modification and test temperatures, might not be best suited for SBS-MB either. The DHR seems to solve the issue and authors strongly recommend the adoption of this testing geometry to obtain more realistic high-temperature viscosity measurement of heterogeneous bituminous binders.

ACS Style

Gaspare Giancontieri; David Hargreaves; Davide Lo Presti. Are we correctly measuring the rotational viscosity of heterogeneous bituminous binders? Road Materials and Pavement Design 2020, 21, S37 -S56.

AMA Style

Gaspare Giancontieri, David Hargreaves, Davide Lo Presti. Are we correctly measuring the rotational viscosity of heterogeneous bituminous binders? Road Materials and Pavement Design. 2020; 21 (sup1):S37-S56.

Chicago/Turabian Style

Gaspare Giancontieri; David Hargreaves; Davide Lo Presti. 2020. "Are we correctly measuring the rotational viscosity of heterogeneous bituminous binders?" Road Materials and Pavement Design 21, no. sup1: S37-S56.

Journal article
Published: 14 January 2020 in Infrastructures
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The jointed rigid pavement is currently evaluated by the Falling weight deflectometer which is rather slow for the testing of the jointed pavements. Continuous nondestructive evaluation of rigid pavements with a rolling wheel deflectometer can be used to measure the load transfer and is investigated. Load transfer is an important indicator of the rigid pavement’s condition and this is the primary factor which is studied. Continuous data from experimental measurements across a joint allows for the determination of not only the load transfer efficiency provided parameters characterizing the pavement is known. A three-dimensional semi-analytical model was implemented for simulating the pavement response near a joint and used for interpretation and verification of the experimental data. Results show that this development is promising for the use of a rolling wheel deflectometer for rapid evaluation of joints.

ACS Style

Pawan Deep; Mathias B. Andersen; Nick Thom; Davide Lo Presti. Toward the Development of Load Transfer Efficiency Evaluation of Rigid Pavements by a Rolling Wheel Deflectometer. Infrastructures 2020, 5, 7 .

AMA Style

Pawan Deep, Mathias B. Andersen, Nick Thom, Davide Lo Presti. Toward the Development of Load Transfer Efficiency Evaluation of Rigid Pavements by a Rolling Wheel Deflectometer. Infrastructures. 2020; 5 (1):7.

Chicago/Turabian Style

Pawan Deep; Mathias B. Andersen; Nick Thom; Davide Lo Presti. 2020. "Toward the Development of Load Transfer Efficiency Evaluation of Rigid Pavements by a Rolling Wheel Deflectometer." Infrastructures 5, no. 1: 7.

Journal article
Published: 07 January 2020 in Materials
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Stone mastic asphalt (SMA) mixtures exhibit excellent behaviour; they are highly resistant to reflective cracking and permanent deformation, as well as providing the wearing surface with an optimal texture. However, the production and compaction temperatures are similar to conventional mixtures, which means that there is a significant consumption of energy, as well as greenhouse gas emissions. Warm mix asphalt (WMA) technology, which has been developed over the last few years, might allow lower temperatures without compromising the mechanical behaviour of the mixtures. Also, over the last few decades, rubberized asphalt has proved to be effective in improving the performance and being environmentally suitable, but it requires higher production temperatures than conventional mixtures. In this study, several tests were performed to evaluate the effect of a chemical WMA additive on the compactability and water sensitivity of rubberized SMA mixtures with both the Marshall and the gyratory compactor. The investigation has shown that the gyratory compactor is more suitable for studying compactability and the water sensitivity of rubberized SMA with WMA additives.

ACS Style

Juan Gallego; Ana María Rodríguez-Alloza; Leticia Saiz-Rodríguez. Evaluation of Warm Rubberized Stone Mastic Asphalt Mixtures through the Marshall and Gyratory Compactors. Materials 2020, 13, 265 .

AMA Style

Juan Gallego, Ana María Rodríguez-Alloza, Leticia Saiz-Rodríguez. Evaluation of Warm Rubberized Stone Mastic Asphalt Mixtures through the Marshall and Gyratory Compactors. Materials. 2020; 13 (2):265.

Chicago/Turabian Style

Juan Gallego; Ana María Rodríguez-Alloza; Leticia Saiz-Rodríguez. 2020. "Evaluation of Warm Rubberized Stone Mastic Asphalt Mixtures through the Marshall and Gyratory Compactors." Materials 13, no. 2: 265.

Journal article
Published: 01 January 2020 in Construction and Building Materials
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ACS Style

Laura Trigos; Juan Gallego; Jose Ignacio Escavy. Heating potential of aggregates in asphalt mixtures exposed to microwaves radiation. Construction and Building Materials 2020, 230, 1 .

AMA Style

Laura Trigos, Juan Gallego, Jose Ignacio Escavy. Heating potential of aggregates in asphalt mixtures exposed to microwaves radiation. Construction and Building Materials. 2020; 230 ():1.

Chicago/Turabian Style

Laura Trigos; Juan Gallego; Jose Ignacio Escavy. 2020. "Heating potential of aggregates in asphalt mixtures exposed to microwaves radiation." Construction and Building Materials 230, no. : 1.

Journal article
Published: 22 December 2019 in Infrastructures
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Pavement structures are designed to withstand continuous damage during their design life. Damage starts as soon as the pavement is open to traffic and increases with time. If maintenance activities are not considered in the initial design or considered but not applied during the service life, damage will grow to a point where rehabilitation may be the only and most expensive option left. In order to monitor the evolution of damage and its severity in pavement structures, a novel data compression approach based on cumulative measurements from a piezoelectric sensor is presented in this paper. Specifically, the piezoelectric sensor uses a thin film of polyvinylidene fluoride to sense the energy produced by the micro deformation generated due to the application of traffic loads. Epoxy solution has been used to encapsulate the membrane providing hardness and flexibility to withstand the high-loads and the high-temperatures during construction of the asphalt layer. The piezoelectric sensors have been exposed to three months of loading (approximately 1.0 million loads of 65 kN) at the French Institute of Science and Technology for Transport, Development and Networks (IFSTTAR) fatigue carrousel. Notably, the sensors survived the construction and testing. Reference measurements were made with a commercial conventional strain gauge specifically designed for measurements in hot mix asphalt layers. Results from the carrousel successfully demonstrate that the novel approach can be considered as a good indicator of damage progression, thus alleviating the need to measure strains in pavement for the purpose of damage tracking.

ACS Style

Mario Manosalvas-Paredes; Nizar Lajnef; Karim Chatti; Kenji Aono; Juliette Blanc; Nick Thom; Gordon Airey; Davide Lo Presti. Data Compression Approach for Long-Term Monitoring of Pavement Structures. Infrastructures 2019, 5, 1 .

AMA Style

Mario Manosalvas-Paredes, Nizar Lajnef, Karim Chatti, Kenji Aono, Juliette Blanc, Nick Thom, Gordon Airey, Davide Lo Presti. Data Compression Approach for Long-Term Monitoring of Pavement Structures. Infrastructures. 2019; 5 (1):1.

Chicago/Turabian Style

Mario Manosalvas-Paredes; Nizar Lajnef; Karim Chatti; Kenji Aono; Juliette Blanc; Nick Thom; Gordon Airey; Davide Lo Presti. 2019. "Data Compression Approach for Long-Term Monitoring of Pavement Structures." Infrastructures 5, no. 1: 1.

Review article
Published: 01 November 2019 in Construction and Building Materials
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The lack of understanding the mechanisms governing the interaction between reclaimed asphalt binder (RAb)1 and recycling agents is one of the technical issues that still need to be resolved when high amount of reclaimed asphalt (RA)2 is used in a new recycled asphalt mixture (RAM). Due to important role of RAb in that interaction and increased used of RA, it becomes necessary to have a way to classify RA, as any other material used in asphalt mixture production. It is very important to determine how much RAb is active by itself (DoA)3, but also to determine how much RAb can be considered available for a mix design of RAM (DoAv)4 when a recycling agent is used. Finally, since that RAM’s properties are strongly dependent on the degree of blending between RAb and recycling agent (DoB)5, it should evaluate to what extent RAb contributes to the final properties of RAM. These blending parameters (DoA, DoAv and DoB) are so crucial that identifying suitable methodologies for their assessment would be extremely important in performing a proper mix design due to dangerous of having a lack of active bitumen in RAM. This paper presents a literature review of methods which have been used for the evaluation and assessment of mentioned parameters, grouped in four macro-areas: mechanical, chemical, visualization and mechanistic approaches. Furthermore, summarized review of used methods was prepared together with their critical review, all with aim to find appropriate methods for determining these parameters.

ACS Style

Marko Orešković; Gustavo Menegusso Pires; Sara Bressi; Kamilla Vasconcelos; Davide Lo Presti. Quantitative assessment of the parameters linked to the blending between reclaimed asphalt binder and recycling agent: A literature review. Construction and Building Materials 2019, 234, 117323 .

AMA Style

Marko Orešković, Gustavo Menegusso Pires, Sara Bressi, Kamilla Vasconcelos, Davide Lo Presti. Quantitative assessment of the parameters linked to the blending between reclaimed asphalt binder and recycling agent: A literature review. Construction and Building Materials. 2019; 234 ():117323.

Chicago/Turabian Style

Marko Orešković; Gustavo Menegusso Pires; Sara Bressi; Kamilla Vasconcelos; Davide Lo Presti. 2019. "Quantitative assessment of the parameters linked to the blending between reclaimed asphalt binder and recycling agent: A literature review." Construction and Building Materials 234, no. : 117323.

Journal article
Published: 30 October 2019 in Construction and Building Materials
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ACS Style

Juan Gallego Medina; Gaspare Giancontieri; Davide Lo Presti. Quality control of manufacturing and hot storage of crumb rubber modified binders. Construction and Building Materials 2019, 233, 1 .

AMA Style

Juan Gallego Medina, Gaspare Giancontieri, Davide Lo Presti. Quality control of manufacturing and hot storage of crumb rubber modified binders. Construction and Building Materials. 2019; 233 ():1.

Chicago/Turabian Style

Juan Gallego Medina; Gaspare Giancontieri; Davide Lo Presti. 2019. "Quality control of manufacturing and hot storage of crumb rubber modified binders." Construction and Building Materials 233, no. : 1.