Outputs (101)

A molecular dynamics analysis of the influence of iron corrosion products on the healing process of bitumen (2024)
Journal Article
Xu, H., Zou, Y., Airey, G., Wang, H., Zhang, H., Wu, S., & Chen, A. (2024). A molecular dynamics analysis of the influence of iron corrosion products on the healing process of bitumen. Construction and Building Materials, 421, Article 135662. https://doi.org/10.1016/j.conbuildmat.2024.135662

Corrosion of iron materials in the asphalt concrete pavement occurs commonly when the bitumen film peels off, and the generation of corrosion products would affect the healing performance of bitumen. To identify the affection, this research focuses o... Read More about A molecular dynamics analysis of the influence of iron corrosion products on the healing process of bitumen.

Interfacial characteristics between bitumen and corrosion products on steel slag surface from molecular scale (2024)
Journal Article
Xu, H., Zou, Y., Airey, G., Wang, H., Zhang, H., Wu, S., …Liang, Y. (2024). Interfacial characteristics between bitumen and corrosion products on steel slag surface from molecular scale. Construction and Building Materials, 417, Article 135324. https://doi.org/10.1016/j.conbuildmat.2024.135324

Corrosion commonly happened on the surface of steel slag during the weathering and accumulation process, whose products would form weak points and affect the interface between bitumen and steel slag. To clear its characteristics in the atomic scales,... Read More about Interfacial characteristics between bitumen and corrosion products on steel slag surface from molecular scale.

Wetting of bio-rejuvenator nanodroplets on bitumen: A molecular dynamics investigation (2024)
Journal Article
Xu, H., Zou, Y., Airey, G., Wang, H., Zhang, H., Wu, S., & Chen, A. (2024). Wetting of bio-rejuvenator nanodroplets on bitumen: A molecular dynamics investigation. Journal of Cleaner Production, 444, Article 141140. https://doi.org/10.1016/j.jclepro.2024.141140

Wetting is the first step during the mix process between rejuvenator and bitumen, which is important for mix efficiency and performance recovery. The wetting of bio-rejuvenator nanodroplets on bitumen was investigated by molecular dynamics (MD) simul... Read More about Wetting of bio-rejuvenator nanodroplets on bitumen: A molecular dynamics investigation.

Guidelines for the implementation of SMARTI: Sustainable Multifunctional Automated Resilient Transport Infrastructure (2023)
Journal Article
Presti, D. L., Hautiere, N., Hornych, P., Nkwanga, H., Mignini, C., McLoughlin, A., …Doherty, P. (2023). Guidelines for the implementation of SMARTI: Sustainable Multifunctional Automated Resilient Transport Infrastructure. Transportation Research Procedia, 72, 2952-2959. https://doi.org/10.1016/j.trpro.2023.11.842

The World's transport infrastructures (TI) network is facing fast changes due to population growth, mobility, business trades and globalization. More challenges are coming from unforeseen natural and human-induced hazards, including climate change's... Read More about Guidelines for the implementation of SMARTI: Sustainable Multifunctional Automated Resilient Transport Infrastructure.

Review of methodology for life cycle assessment and life cycle cost analysis of asphalt pavements (2023)
Journal Article
Suwarto, F., Parry, T., & Airey, G. (2023). Review of methodology for life cycle assessment and life cycle cost analysis of asphalt pavements. Road Materials and Pavement Design, https://doi.org/10.1080/14680629.2023.2278149

Different approaches continue to be used to evaluate the environmental and financial impactsof road pavements throughout their life cycle. This paper aims to provide a methodological review of published studies of asphalt pavement Life Cycle Assessme... Read More about Review of methodology for life cycle assessment and life cycle cost analysis of asphalt pavements.

2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model (2023)
Journal Article
Li, L., Wu, J., Thom, N., Hargreaves, D., Airey, G., Zhu, J., …Zhang, Z. (2023). 2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model. International Journal of Pavement Engineering, 24(1), Article 2242557. https://doi.org/10.1080/10298436.2023.2242557

The primary objective of this paper was to develop a combined model that incorporates moisture diffusion and a cohesive zone model, addressing anisotropic and loading-rate dependent cracking within partially saturated asphalt. Utilising X-ray CT scan... Read More about 2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model.

Engineering characterization and environmental analysis of natural rubber latex modified asphalt mixture (2023)
Journal Article
Suwarto, F., Parry, T., Thom, N., Airey, G., Abed, A., Rahman, T., & Wititanapanit, J. (2023). Engineering characterization and environmental analysis of natural rubber latex modified asphalt mixture. Construction and Building Materials, 402, Article 132970. https://doi.org/10.1016/j.conbuildmat.2023.132970

Natural Rubber Latex (NRL) has attracted considerable interest as a resource for renewable paving materials due to its potential to lessen environmental impact. In order to gain a thorough understanding of the performance of NRL, this study evaluated... Read More about Engineering characterization and environmental analysis of natural rubber latex modified asphalt mixture.

Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators (2023)
Journal Article
Abed, A., Rahman, M., Thom, N., Hargreaves, D., Li, L., & Airey, G. (2023). Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators. Transportation Research Record, 2677(11), 651-664. https://doi.org/10.1177/03611981231166684

Potholes represent one of the dangerous distress types on roads. They form as a result of various factors, including water ingress, freeze–thaw, and pavement condition deterioration. In the UK, 1.7 million potholes were repaired in 2021; this critica... Read More about Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators.

Uncertainty analysis of life cycle assessment of asphalt surfacings (2023)
Journal Article
Abed, A., Godoi Bizarro, D. E., Neves, L., Parry, T., Keijzer, E., Kalman, B., …Airey, G. (2023). Uncertainty analysis of life cycle assessment of asphalt surfacings. Road Materials and Pavement Design, https://doi.org/10.1080/14680629.2023.2199882

The Life Cycle Assessment (LCA) of asphalt pavements are associated with significant uncertainty resulting from variability in the quantity and impact of individual components, the quality of data for each component, and variability of asphalt durabi... Read More about Uncertainty analysis of life cycle assessment of asphalt surfacings.

Rubberised stone mastic asphalt mixtures: a performance-related evaluation (2022)
Journal Article
Subhy, A., Lo Presti, D., Airey, G., & Edwards, P. (2023). Rubberised stone mastic asphalt mixtures: a performance-related evaluation. Road Materials and Pavement Design, 24(9), 2280-2300. https://doi.org/10.1080/14680629.2022.2136580

The binder content of rubberised asphalt mixtures is usually increased compared to that used in conventional asphalt. This increase is deemed important to compensate for the reduction in the actual bitumen due to the existence of rubber particles. Th... Read More about Rubberised stone mastic asphalt mixtures: a performance-related evaluation.

Micromechanics-Based Viscoelasticity Predictions of Crumb Rubber Modified Bitumen Considering Polymer Network Effects (2022)
Journal Article
Wang, H., Zhang, H., Liu, X., Apostolidis, P., Erkens, S., Skarpas, A., …Airey, G. (2022). Micromechanics-Based Viscoelasticity Predictions of Crumb Rubber Modified Bitumen Considering Polymer Network Effects. Transportation Research Record, 2676(10), 73-88. https://doi.org/10.1177/03611981221088595

Crumb rubber modified bitumen (CRMB) can be regarded as a binary composite system in which swollen rubber particles are embedded in the bitumen matrix. Previous study has successfully implemented the micromechanics models in predicting the complex mo... Read More about Micromechanics-Based Viscoelasticity Predictions of Crumb Rubber Modified Bitumen Considering Polymer Network Effects.

Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments (2022)
Journal Article
Weir, A., Jiménez del Barco Carrión, A., Queffélec, C., Bujoli, B., Chailleux, E., Uguna, C., …Airey, G. (2022). Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments. Construction and Building Materials, 330, Article 127076. https://doi.org/10.1016/j.conbuildmat.2022.127076

Biobinders (binders manufactured from biomass) are becoming popular in asphalt engineering due to growing environmental concerns of greenhouse gas emissions from the use of fossil fuels and depleting petroleum bitumen reserves. Waste biomass products... Read More about Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments.

Characterisation of fatigue damage in asphalt mixtures using X-ray computed tomography (2022)
Journal Article
Chen, A., Airey, G., Thom, N., & Li, Y. (2022). Characterisation of fatigue damage in asphalt mixtures using X-ray computed tomography. Road Materials and Pavement Design, https://doi.org/10.1080/14680629.2022.2029756

The high-resolution X-ray CT was applied to investigate the fatigue damage evolution of asphalt mixtures. The detailed Xray CT images in the centre of the samples were used to characterise the fatigue cracking and air voids increase at different vert... Read More about Characterisation of fatigue damage in asphalt mixtures using X-ray computed tomography.

Black Space Rheological Assessment of Asphalt Material Behavior (2021)
Journal Article
Airey, G. D., Rowe, G. M., Sias, J. E., Di Benedetto, H., Sauzeat, C., & Dave, E. V. (2022). Black Space Rheological Assessment of Asphalt Material Behavior. Journal of Testing and Evaluation, 50(2), 770-787. https://doi.org/10.1520/JTE20210205

Black Space diagrams representing rheological data of asphalt materials in the form of complex modulus (|G*| or |E*|) versus phase angle (δ) have been successfully used for interpretation of material behavior and performance. Previous studies have us... Read More about Black Space Rheological Assessment of Asphalt Material Behavior.

Effect of hydrated lime and other mineral fillers on stiffening and oxidative ageing in bitumen mastic (2021)
Journal Article
Alfaqawi, R. M., Fareed, A., Zaidi, S. B. A., Airey, G. D., & Rahim, A. (2022). Effect of hydrated lime and other mineral fillers on stiffening and oxidative ageing in bitumen mastic. Construction and Building Materials, 315, Article 125789. https://doi.org/10.1016/j.conbuildmat.2021.125789

The bituminous binder's ageing process is the primary reason behind the decrement in the pavement's in-service life, which can lead to cracking as a result of extreme hardening of the binder. In order to mitigate this problem, several methods have be... Read More about Effect of hydrated lime and other mineral fillers on stiffening and oxidative ageing in bitumen mastic.

Comparison of the Effects of Hydrated Lime on the Moisture-Induced Damage of Stone Mastic Asphalt (SMA) Mixtures (2021)
Conference Proceeding
Badal, A., Carvajal-Munoz, J. S., & Airey, G. (2022). Comparison of the Effects of Hydrated Lime on the Moisture-Induced Damage of Stone Mastic Asphalt (SMA) Mixtures. In Proceedings of the RILEM International Symposium on Bituminous Materials (465-471). https://doi.org/10.1007/978-3-030-46455-4_59

Moisture-induced damage is one of the most prominent distresses affecting pavement structures worldwide. As a consequence, various strategies for mitigating this phenomenon have been proposed, including the use of additives to improve bitumen-aggrega... Read More about Comparison of the Effects of Hydrated Lime on the Moisture-Induced Damage of Stone Mastic Asphalt (SMA) Mixtures.

Experimental Investigation on Water Loss and Stiffness of CBTM Using Different RA Sources (2021)
Conference Proceeding
Grilli, A., Raschia, S., Perraton, D., Carter, A., Rahmanbeiki, A., Kara De Maeijer, P., …Tebaldi, G. (2022). Experimental Investigation on Water Loss and Stiffness of CBTM Using Different RA Sources. In H. Di Benedetto, H. Baaj, E. Chailleux, G. Tebaldi, C. Sauzéat, & S. Mangiafico (Eds.), Proceedings of the RILEM International Symposium on Bituminous Materials: ISBM Lyon 2020 (11-17). https://doi.org/10.1007/978-3-030-46455-4_2

Cold recycling of reclaimed asphalt (RA) is a promising technique to build or to maintain roads, combining performance and environmental advantages. Although this technique has been extensively used worldwide, there is no unique and internationally-s... Read More about Experimental Investigation on Water Loss and Stiffness of CBTM Using Different RA Sources.

Temperature Dependency of the Stiffening Effect of Hydrated Lime in Stone Mastic Asphalt (SMA) Mixtures (2021)
Conference Proceeding
Cardenas, M., Carvajal-Munoz, J. S., & Airey, G. (2022). Temperature Dependency of the Stiffening Effect of Hydrated Lime in Stone Mastic Asphalt (SMA) Mixtures. In H. Di Benedetto, H. Baaj, E. Chailleux, G. Tebaldi, C. Sauzéat, & S. Mangiafico (Eds.), Proceedings of the RILEM International Symposium on Bituminous Materials: ISBM 2020 (1743-1749). https://doi.org/10.1007/978-3-030-46455-4_221

The effect of hydrated lime (HL) on the stiffening effect of bituminous mixtures is mainly driven by a physical phenomenon derived from the higher Rigden Air Voids (RAV) of HL in contrast to other filler types commonly used in bituminous mixtures suc... Read More about Temperature Dependency of the Stiffening Effect of Hydrated Lime in Stone Mastic Asphalt (SMA) Mixtures.

Crack Self-healing in Asphalt as a Flow Process (2021)
Book Chapter
Grossegger, D., Garcia, A., & Airey, G. (2022). Crack Self-healing in Asphalt as a Flow Process. In Proceedings of the RILEM International Symposium on Bituminous Materials (489-495). Springer International Publishing. https://doi.org/10.1007/978-3-030-46455-4_62

Asphalt has the ability to restore diminished properties caused by damage. This ability is known as self-healing and in case of asphalt it is conferred upon by the competent bitumen. Bitumen is a viscoelastic liquid and has self-healing abilities due... Read More about Crack Self-healing in Asphalt as a Flow Process.

Fracture Characterization of Stone Mastic Asphalt (SMA) with Hydrated Lime Through the Semi-circular Bending Test Approach (2021)
Conference Proceeding
Ahmed, A. M., Carvajal-Munoz, J. S., & Airey, G. (2022). Fracture Characterization of Stone Mastic Asphalt (SMA) with Hydrated Lime Through the Semi-circular Bending Test Approach. In Proceedings of the RILEM International Symposium on Bituminous Materials (935-941). https://doi.org/10.1007/978-3-030-46455-4_119

Hydrated lime (HL) use as an active filler is due to its ability to increase the stiffness of asphalt mixtures as well as the mechanical and physicochemical performance through improved rutting resistance, reduced aging, and enhanced moisture-induced... Read More about Fracture Characterization of Stone Mastic Asphalt (SMA) with Hydrated Lime Through the Semi-circular Bending Test Approach.

Modelling the stiffness development in asphalt concrete to obtain fatigue failure criteria (2021)
Journal Article
Chen, A., Airey, G. D., Thom, N., Litherland, J., & Adjetey Nii-Adjei, R. (2021). Modelling the stiffness development in asphalt concrete to obtain fatigue failure criteria. Construction and Building Materials, 306, Article 124837. https://doi.org/10.1016/j.conbuildmat.2021.124837

The study of fatigue is critical to good usability and durability of asphalt pavements. Inaccurate calculation of the fatigue failure criteria can cause incorrect evaluation of the fatigue performance, leading to inaccurate prediction of the pavement... Read More about Modelling the stiffness development in asphalt concrete to obtain fatigue failure criteria.

Rutting analysis of different rubberised stone mastic asphalt mixtures: from binders to mixtures (2021)
Journal Article
Subhy, A., Lo Presti, D., Airey, G., & Widyatmoko, I. (2022). Rutting analysis of different rubberised stone mastic asphalt mixtures: from binders to mixtures. Road Materials and Pavement Design, 23(9), 2098-2114. https://doi.org/10.1080/14680629.2021.1950818

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... Read More about Rutting analysis of different rubberised stone mastic asphalt mixtures: from binders to mixtures.

Stiffening Effect of Fillers Based on Rheology and Micromechanics Models (2021)
Journal Article
Rahim, A., Milad, A., Yusoff, N. I. M., Airey, G., & Thom, N. (2021). Stiffening Effect of Fillers Based on Rheology and Micromechanics Models. Applied Sciences, 11(14), Article 6521. https://doi.org/10.3390/app11146521

The aggregate in an asphalt mixture is coated with mastic consisting of bitumen (dilute phase) and filler (particulates phase). The interaction of bitumen and filler and packing of filler plays an important role in the properties of mastics. The micr... Read More about Stiffening Effect of Fillers Based on Rheology and Micromechanics Models.

Rheological characterisation of cold bitumen emulsion slurries (2021)
Journal Article
Mignini, C., Lo Presti, D., Airey, G., & Graziani, A. (2021). Rheological characterisation of cold bitumen emulsion slurries. Road Materials and Pavement Design, 22(Sup1), S232-S250. https://doi.org/10.1080/14680629.2021.1906303

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 ai... Read More about Rheological characterisation of cold bitumen emulsion slurries.

The composition of the material phase responsible for the self-healing of macro-cracks in asphalt mortar beams (2020)
Journal Article
Grossegger, D., Garcia, A., & Airey, G. (2022). The composition of the material phase responsible for the self-healing of macro-cracks in asphalt mortar beams. Road Materials and Pavement Design, 23(3), 656-665. https://doi.org/10.1080/14680629.2020.1842793

Self-healing of asphalt is assumed to be a flow process where bitumen flows into cracks to close them. Hence, the rheological behaviour of bitumen is one of the main factors affecting self-healing together with damage history, healing duration and pr... Read More about The composition of the material phase responsible for the self-healing of macro-cracks in asphalt mortar beams.

Sustainable utilization of bauxite residue (Red Mud) as a road material in pavements: A critical review (2020)
Journal Article
Zhang, J., Yao, Z., Wang, K., Wang, F., Jiang, H., Liang, M., …Airey, G. (2021). Sustainable utilization of bauxite residue (Red Mud) as a road material in pavements: A critical review. Construction and Building Materials, 270, Article 121419. https://doi.org/10.1016/j.conbuildmat.2020.121419

Sustainable utilization of the bauxite residue (red mud) generated from the alumina refining has recently increased due to increased environmental concerns because of its high alkalinity and problematic pollutants when placed in landfills. This paper... Read More about Sustainable utilization of bauxite residue (Red Mud) as a road material in pavements: A critical review.

Application of image analysis tools in Matlab to better estimate the degree of binder coverage in rolling bottles test (2020)
Journal Article
Zaidi, S. B. A., Grenfell, J., Airey, G., Ahmad, N., Ahmed, I., Fareed, A., & Abed, A. (2020). Application of image analysis tools in Matlab to better estimate the degree of binder coverage in rolling bottles test. Road Materials and Pavement Design, 23(3), 601-616. https://doi.org/10.1080/14680629.2020.1834441

© 2020 Informa UK Limited, trading as Taylor & Francis Group. In asphalt mixture, a strong affinity between binder and aggregates is of prime importance, especially under conditions susceptible to moisture damage. Out of various modifiers/additives... Read More about Application of image analysis tools in Matlab to better estimate the degree of binder coverage in rolling bottles test.

Performance-related and rheological characterisation of natural rubber modified bitumen (2020)
Journal Article
Wititanapanit, J., Carvajal-Munoz, J. S., & Airey, G. (2021). Performance-related and rheological characterisation of natural rubber modified bitumen. Construction and Building Materials, 268, Article 121058. https://doi.org/10.1016/j.conbuildmat.2020.121058

This paper is motivated by the limited research available evaluating the comprehensive effects of natural rubber bitumen modification (NR) for pavement applications. A detailed laboratory programme was carried out to evaluate the influence of NR on t... Read More about Performance-related and rheological characterisation of natural rubber modified bitumen.

Applicability of time-temperature superposition for laboratory-aged neat and SBS-modified bitumens (2020)
Journal Article
Cuciniello, G., Leandri, P., Polacco, G., Airey, G., & Losa, M. (2020). Applicability of time-temperature superposition for laboratory-aged neat and SBS-modified bitumens. Construction and Building Materials, 263, Article 120964. https://doi.org/10.1016/j.conbuildmat.2020.120964

© 2020 Elsevier Ltd The applicability of the time–temperature superposition principle (TTSP) can breakdown in the case of highly oxidized bitumens and polymer-modified bitumens (PMBs). This study investigates such problem in Styrene Butadiene Styrene... Read More about Applicability of time-temperature superposition for laboratory-aged neat and SBS-modified bitumens.

Effects of ageing on the damage tolerance of polymer modified bitumens investigated through the LAS test and fluorescence microscopy (2020)
Journal Article
Cuciniello, G., Leandri, P., Losa, M., & Airey, G. (2020). Effects of ageing on the damage tolerance of polymer modified bitumens investigated through the LAS test and fluorescence microscopy. International Journal of Pavement Engineering, 23(4), 1-12. https://doi.org/10.1080/10298436.2020.1788031

The effects of polymer modification on the durability of Polymer Modified Bitumens (PMBs) still remain relatively unclear due to partial understanding of the combined effects of ageing and loading on damage accumulation. This paper investigates the e... Read More about Effects of ageing on the damage tolerance of polymer modified bitumens investigated through the LAS test and fluorescence microscopy.

Multi-Scale Rheo-Mechanical Study of SMA Mixtures Containing Fine Crumb Rubber in a New Dry-Hybrid Technology (2020)
Journal Article
Mazzotta, F., Tataranni, P., Simone, A., Fornai, D., Airey, G., & Sangiorgi, C. (2020). Multi-Scale Rheo-Mechanical Study of SMA Mixtures Containing Fine Crumb Rubber in a New Dry-Hybrid Technology. Applied Sciences, 10(11), Article 3887. https://doi.org/10.3390/app10113887

Moisture susceptibility assessment of hydrated lime modified asphalt mixture and surface energy (2020)
Journal Article
Zaidi, S. B. A., Airey, G. D., Grenfell, J., Ahmad, N., & Ahmed, I. (2022). Moisture susceptibility assessment of hydrated lime modified asphalt mixture and surface energy. International Journal of Pavement Engineering, 23(3), 599-611. https://doi.org/10.1080/10298436.2020.1763347

The influence of hydrated lime on moisture susceptibility of asphalt mixture was assessed using a combination of surface energy measurements and modified saturation ageing and tensile stiffness test. Four aggregate types, which are commonly used for... Read More about Moisture susceptibility assessment of hydrated lime modified asphalt mixture and surface energy.

Thermo-rheological analysis of WMA-additive modified binders (2020)
Journal Article
Abed, A., Thom, N., Lo Presti, D., & Airey, G. (2020). Thermo-rheological analysis of WMA-additive modified binders. Materials and Structures, 53(3), https://doi.org/10.1617/s11527-020-01480-1

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-rheolog... Read More about Thermo-rheological analysis of WMA-additive modified binders.

Experimental Exploration of Influence of Recycled Polymer Components on Rutting Resistance and Fatigue Behavior of Asphalt Mixtures (2020)
Journal Article
Zhang, J., Li, H., Liu, P., Liang, M., Jiang, H., Yao, Z., & Airey, G. (2020). Experimental Exploration of Influence of Recycled Polymer Components on Rutting Resistance and Fatigue Behavior of Asphalt Mixtures. Journal of Materials in Civil Engineering, 32(6), https://doi.org/10.1061/%28asce%29mt.1943-5533.0003140

Rutting and fatigue of asphalt pavements, as two important distresses, are significantly influenced by the properties of binders. This study aimed to improve the resistance of asphalt mixtures to permanent deformation and fatigue using two recycled w... Read More about Experimental Exploration of Influence of Recycled Polymer Components on Rutting Resistance and Fatigue Behavior of Asphalt Mixtures.

Effect of different viscous rejuvenators on chemical and mechanical behavior of aged and recovered bitumen from RAP (2019)
Journal Article
Zhang, J., Sun, C., Li, P., Jiang, H., Liang, M., Yao, Z., …Airey, G. (2020). Effect of different viscous rejuvenators on chemical and mechanical behavior of aged and recovered bitumen from RAP. Construction and Building Materials, 239, Article 117755. https://doi.org/10.1016/j.conbuildmat.2019.117755

© 2019 Elsevier Ltd Due to scarcity of virgin natural materials, the use of reclaimed asphalt pavement (RAP) has been promoted and encouraged in pavement engineering. However, note that the bituminous binder in RAP has been seriously aged due to long... Read More about Effect of different viscous rejuvenators on chemical and mechanical behavior of aged and recovered bitumen from RAP.

Data Compression Approach for Long-Term Monitoring of Pavement Structures (2019)
Journal Article
Manosalvas-Paredes, M., Lajnef, N., Chatti, K., Aono, K., Blanc, J., Thom, N., …Lo Presti, D. (2019). Data Compression Approach for Long-Term Monitoring of Pavement Structures. Infrastructures, 5, Article 1. https://doi.org/10.3390/infrastructures5010001

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 consider... Read More about Data Compression Approach for Long-Term Monitoring of Pavement Structures.

Environmental effects on the rheological properties of fine warm RAP-foamed bitumen mixtures using SATS conditioning protocol (2019)
Journal Article
Sánchez, D. B., Airey, G., Caro, S., & Grenfell, J. (2019). Environmental effects on the rheological properties of fine warm RAP-foamed bitumen mixtures using SATS conditioning protocol. International Journal of Pavement Engineering, 1-11. https://doi.org/10.1080/10298436.2019.1679365

© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. This paper uses the Saturation Ageing Tensile Stiffness (SATS) conditioning to evaluate the combined effects of moisture and oxidative ageing on the rheological characteristics o... Read More about Environmental effects on the rheological properties of fine warm RAP-foamed bitumen mixtures using SATS conditioning protocol.

A practical approach to estimate the degree of binder activity of reclaimed asphalt materials (2019)
Journal Article
Menegusso Pires, G., Lo Presti, D., & Airey, G. D. (2019). A practical approach to estimate the degree of binder activity of reclaimed asphalt materials. Road Materials and Pavement Design, 1-24. https://doi.org/10.1080/14680629.2019.1663244

© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. Using Reclaimed Asphalt (RA) in new asphalt mixtures can reduce the amount of new material required thereby saving money and natural resources. In addition, asphalt mixtures with... Read More about A practical approach to estimate the degree of binder activity of reclaimed asphalt materials.

Comparative Evaluation of Moisture Susceptibility Test Methods for Routine Usage in Asphalt Mixture Design (2019)
Journal Article
DeCarlo, C., Dave, E. V., Sias, J. E., Airey, G., & Mallick, R. (2020). Comparative Evaluation of Moisture Susceptibility Test Methods for Routine Usage in Asphalt Mixture Design. Journal of Testing and Evaluation, 48(1), 88-106. https://doi.org/10.1520/jte20180908

Moisture susceptibility of hydrated lime modified mastics using adhesion test methods and surface free energy techniques (2019)
Journal Article
Zaidi, S. B. A., Airey, G. D., Grenfell, J., Alfaqawi, R. M., Ahmed, I., Ahmad, N., & Haynes, M. (2019). Moisture susceptibility of hydrated lime modified mastics using adhesion test methods and surface free energy techniques. International Journal of Pavement Engineering, 1-13. https://doi.org/10.1080/10298436.2019.1648811

© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. Moisture damage is one of the major factors that has been reported to affect the performance of asphalt pavements which depends mainly on the bond strength between bitumen, aggre... Read More about Moisture susceptibility of hydrated lime modified mastics using adhesion test methods and surface free energy techniques.

Binder and Mixture Fatigue Performance of Plant-Produced Road Surface Course Asphalt Mixtures with High Contents of Reclaimed Asphalt (2019)
Journal Article
Subhy, A., Pires, G., Carrión, A., Lo Presti, D., & Airey, G. (2019). Binder and Mixture Fatigue Performance of Plant-Produced Road Surface Course Asphalt Mixtures with High Contents of Reclaimed Asphalt. Sustainability, 11(13), https://doi.org/10.3390/su11133752

© 2019 by the authors. The aged properties of Reclaimed Asphalt (RA) binders are one of the main factors working against their utilisation in high-RA content ( > 30%) mixes for surface courses. Fatigue cracking is the main distress of surface courses... Read More about Binder and Mixture Fatigue Performance of Plant-Produced Road Surface Course Asphalt Mixtures with High Contents of Reclaimed Asphalt.

Microstructure and rheological response of laboratory-aged SBS-modified bitumens (2019)
Journal Article
Cuciniello, G., Leandri, P., Filippi, S., Lo Presti, D., Polacco, G., Losa, M., & Airey, G. (2019). Microstructure and rheological response of laboratory-aged SBS-modified bitumens. Road Materials and Pavement Design, https://doi.org/10.1080/14680629.2019.1621771

Polymer additives are widely used to improve the performance of road bitumens including their resistance to hardening during oxidation, although their oxidative inhibitor effect has not been well documented. This study aims to investigate the effect... Read More about Microstructure and rheological response of laboratory-aged SBS-modified bitumens.

Enhancement of curing properties of cold in-place recycling asphalt mixtures by induction heating (2019)
Journal Article
Pérez, I., Gómez-Meijide, B., Pasandín, A. R., García, A., & Airey, G. (2021). Enhancement of curing properties of cold in-place recycling asphalt mixtures by induction heating. International Journal of Pavement Engineering, 22(3), 355-368. https://doi.org/10.1080/10298436.2019.1609674

© 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. In this study, samples of cold in-place recycling mix (CIR) with steel fibres were manufactured and heated by electromagnetic induction. Heating was c... Read More about Enhancement of curing properties of cold in-place recycling asphalt mixtures by induction heating.

Effect of foaming technique and mixing temperature on the rheological characteristics of fine RAP-foamed bitumen mixtures (2019)
Journal Article
Sánchez, D. B., Airey, G., Caro, S., & Grenfell, J. (2020). Effect of foaming technique and mixing temperature on the rheological characteristics of fine RAP-foamed bitumen mixtures. Road Materials and Pavement Design, 21(8), 2143-2159. https://doi.org/10.1080/14680629.2019.1593228

This paper evaluates and compares the differences in the rheological characteristics of the fine aggregate matrix (FAM) portion of plant produced Foamed Bitumen Mixtures (FBMs) by means of a mechanical foaming process, and by the incorporation of zeo... Read More about Effect of foaming technique and mixing temperature on the rheological characteristics of fine RAP-foamed bitumen mixtures.

Intrinsic adhesive and cohesive assessment of the moisture sensitivity of bio-rejuvenated recycled asphalt binders (2019)
Journal Article
Jiménez del Barco Carrión, A., Carvajal-Muñoz, J. S., Lo Presti, D., & Airey, G. (2019). Intrinsic adhesive and cohesive assessment of the moisture sensitivity of bio-rejuvenated recycled asphalt binders. Road Materials and Pavement Design, 20(Supplement 1), S347-S364. https://doi.org/10.1080/14680629.2019.1588778

Alternative binders not derived from fossil fuels, known as biobinders, are opening new paths for multiple applications in road infrastructure. Biobinders, usually produced from bio-oils obtained from the processing of biomass and industry by-product... Read More about Intrinsic adhesive and cohesive assessment of the moisture sensitivity of bio-rejuvenated recycled asphalt binders.

Development of compression pull-off test (CPOT) to assess bond strength of bitumen (2019)
Journal Article
Rahim, A., Thom, N., & Airey, G. (2019). Development of compression pull-off test (CPOT) to assess bond strength of bitumen. Construction and Building Materials, 207, 412-421. https://doi.org/10.1016/j.conbuildmat.2019.02.093

The quantification of moisture susceptibility has been a major concern for researchers as it adversely affects the performance of asphalt pavements. Several methods have been developed to assess bond strength using asphalt mixtures in loose and compa... Read More about Development of compression pull-off test (CPOT) to assess bond strength of bitumen.

Effect of ageing on the morphology and creep and recovery of polymer-modified bitumens (2018)
Journal Article
Cuciniello, G., Leandri, P., Filippi, S., Lo Presti, D., Losa, M., & Airey, G. (2018). Effect of ageing on the morphology and creep and recovery of polymer-modified bitumens. Materials and Structures, 51, https://doi.org/10.1617/s11527-018-1263-3

Polymer additives are used to improve the properties of road bitumens including their oxidative resistance. However, their usage as anti-oxidative materials remains relatively unclear. This study aims to investigate the changes in the morphology and... Read More about Effect of ageing on the morphology and creep and recovery of polymer-modified bitumens.

Simulating plant produced material in the laboratory to replicate rheological and fatigue properties (2018)
Journal Article
Oshone, M., Pires, G. M., Jiménez del Barco Carrión, A., Rahbar-Rastegar, R., Airey, G., Daniel, J. S., …Smith, D. (in press). Simulating plant produced material in the laboratory to replicate rheological and fatigue properties. Road Materials and Pavement Design, https://doi.org/10.1080/14680629.2018.1484384

As part of an effort by agencies and industry to move towards performance-based design to evaluate mixtures in the laboratory at a smaller scale before moving to full scale operation, laboratory protocols exist to simulate the aging that occurs as a... Read More about Simulating plant produced material in the laboratory to replicate rheological and fatigue properties.

The effects of laboratory ageing on rheological and fracture characteristics of different rubberised bitumens (2018)
Journal Article
Subhy, A., Pires, G. M., Lo Presti, D., & Airey, G. (2018). The effects of laboratory ageing on rheological and fracture characteristics of different rubberised bitumens. Construction and Building Materials, 180, https://doi.org/10.1016/j.conbuildmat.2018.05.273

Ageing of bituminous materials can result in loss of the durability of a flexible pavement. Using rubberised bitumens can enhance pavement performance while at the same time it solves a serious waste disposal problem. Combining Warm Mix Asphalt (WMA)... Read More about The effects of laboratory ageing on rheological and fracture characteristics of different rubberised bitumens.

Developing the multiple stress–strain creep recovery (MS-SCR) test (2018)
Journal Article
Elnasri, M. M. H., Airey, G., & Thom, N. (in press). Developing the multiple stress–strain creep recovery (MS-SCR) test. Mechanics of Time-Dependent Materials, https://doi.org/10.1007/s11043-018-9387-y

While most published work from Europe has been concerned with evaluating binders’ resistance to rutting based on their stiffness (deformation resistance), work originating in the US has mainly been concerned with ranking binders based on their recove... Read More about Developing the multiple stress–strain creep recovery (MS-SCR) test.

Linear viscous approach to predict rut depth in asphalt mixtures (2018)
Journal Article
Al-Mosawe, H., Thom, N., Airey, G., & Albayati, A. (in press). Linear viscous approach to predict rut depth in asphalt mixtures. Construction and Building Materials, 169, https://doi.org/10.1016/j.conbuildmat.2017.11.065

Rutting in asphalt mixtures is a very common type of distress. It occurs due to the heavy load applied and slow movement of traffic. Rutting needs to be predicted to avoid major deformation to the pavement. A simple linear viscous method is used i... Read More about Linear viscous approach to predict rut depth in asphalt mixtures.

Physical and rheological characterization of carbonated bitumen for paving applications (2017)
Journal Article
Apeagyei, A. K., & Airey, G. (2018). Physical and rheological characterization of carbonated bitumen for paving applications. Materials and Design, 140, https://doi.org/10.1016/j.matdes.2017.11.069

In the paving industry, current attempts aimed at reducing greenhouse gas emissions have focused on the development of technologies that decrease bitumen viscosity so that asphalt mixtures can be produced at temperatures that are lower than conventio... Read More about Physical and rheological characterization of carbonated bitumen for paving applications.

Relative pavement performance for dual and wide-based tyre assemblies using a finite element method (2017)
Journal Article
Casey, D., Airey, G., & Grenfell, J. (2017). Relative pavement performance for dual and wide-based tyre assemblies using a finite element method. Journal of Testing and Evaluation, 45(6), https://doi.org/10.1520/JTE20160589

There is a need to assess the realistic tire contact pressure created by a tire in contact with a pavement. The contact pressure is a function of tire type, axle loading, and tire inflation pressure (TiP). The research carried out considered dual tir... Read More about Relative pavement performance for dual and wide-based tyre assemblies using a finite element method.

Laboratory evaluation of Rediset modified bitumen based on rheology and adhesion properties (2017)
Journal Article
Zhang, J., Airey, G., Grenfell, J., & Yao, Z. (2017). Laboratory evaluation of Rediset modified bitumen based on rheology and adhesion properties. Construction and Building Materials, 152, https://doi.org/10.1016/j.conbuildmat.2017.07.037

Warm mix asphalt (WMA) could significantly reduce the production temperature of asphalt mixtures. Lower production temperature meaning reduced fossil fuel consumption and greenhouse gas emission which in turn avoid environmental pollution in the road... Read More about Laboratory evaluation of Rediset modified bitumen based on rheology and adhesion properties.

Evaluation of bio-materials’ rejuvenating effect on binders for high-reclaimed asphalt content mixtures (2017)
Journal Article
Jiménez del Barco Carrión, A., Perez-Martinez, M., Themeli, A., Lo Presti, D., Marsac, P., Pouget, S., …Airey, G. (in press). Evaluation of bio-materials’ rejuvenating effect on binders for high-reclaimed asphalt content mixtures. Materiales de Construcción, 67(327), https://doi.org/10.3989/mc.2017.04516

The interest in using bio-materials in pavement engineering has grown significantly over the last decades due to environmental concerns about the use of non-recoverable natural resources. In this paper, bio-materials are used together with Reclaimed... Read More about Evaluation of bio-materials’ rejuvenating effect on binders for high-reclaimed asphalt content mixtures.

Self-healing of dense asphalt concrete by two different approaches: Electromagnetic induction and infrared radiation (2017)
Journal Article
Ajam, H., Lastra-Gonzalez, P., Gomez-Meijide, B., Airey, G., & Garcia, A. (in press). Self-healing of dense asphalt concrete by two different approaches: Electromagnetic induction and infrared radiation. Journal of Testing and Evaluation, 45(6), https://doi.org/10.1520/JTE20160612

Self-healing of cracks in asphalt mixtures is a phenomenon that can be accelerated by reducing the viscosity of bitumen as it increases the capillarity flow through the cracks. One method to achieve this is by increasing temperature, which also produ... Read More about Self-healing of dense asphalt concrete by two different approaches: Electromagnetic induction and infrared radiation.

Evaluation of the fracture performance of different rubberised bitumens based on the essential work of fracture (2017)
Journal Article
Subhy, A., Subhy, A., Lo Presti, D., & Airey, G. (2017). Evaluation of the fracture performance of different rubberised bitumens based on the essential work of fracture. Engineering Fracture Mechanics, 179, 203-212. https://doi.org/10.1016/j.engfracmech.2017.04.035

The fracture performance of rubberised bitumen in addition to one pre-treated with a Warm Mix Additive (Sasobit®) was investigated using different test methods measuring different damage mechanisms. Two Recycled Tyre Rubber (RTR) modifiers together w... Read More about Evaluation of the fracture performance of different rubberised bitumens based on the essential work of fracture.

New simplified approach for obtaining a reliable plateau value in fatigue analysis of bituminous materials (2017)
Journal Article
Subhy, A., Lo Presti, D., & Airey, G. (2017). New simplified approach for obtaining a reliable plateau value in fatigue analysis of bituminous materials. Engineering Failure Analysis, 79, 263-273. https://doi.org/10.1016/j.engfailanal.2017.05.021

The Plateau Value (PV) based on the Ratio of Dissipated Energy Change (RDEC) approach has been proven to provide a unique relationship with the fatigue life, Nf, independent of loading mode, temperature and frequency. In this paper, a new simplified... Read More about New simplified approach for obtaining a reliable plateau value in fatigue analysis of bituminous materials.

Evaluation of the degradation of fine asphalt-aggregate mixtures containing high reclaimed asphalt pavement contents (2017)
Journal Article
Sánchez, D. B., Grenfell, J., Airey, G., & Caro, S. (in press). Evaluation of the degradation of fine asphalt-aggregate mixtures containing high reclaimed asphalt pavement contents. Road Materials and Pavement Design, 18(sup2), https://doi.org/10.1080/14680629.2017.1304250

This paper evaluates the mechanical properties and performance of the fine aggregate matrix (FAM) existing within full reclaimed asphalt pavement (RAP) asphalt mixtures, in terms of their rheological and fatigue deterioration properties. The RAP mate... Read More about Evaluation of the degradation of fine asphalt-aggregate mixtures containing high reclaimed asphalt pavement contents.

Linear viscoelastic properties of high reclaimed asphalt content mixes with biobinders (2017)
Journal Article
Chailleux, E., Pouget, S., Barco Carrión, A., Barco Carrión, A. J. D., Lo Presti, D., Pouget, S., …Chailleux, E. (2017). Linear viscoelastic properties of high reclaimed asphalt content mixes with biobinders. Road Materials and Pavement Design, 18(sup2), 241-251. https://doi.org/10.1080/14680629.2017.1304253

The use of high Reclaimed Asphalt (RA) content mixtures together with binders produced from renewable resources (biobinders) is one of the current challenges in pavement engineering research. On the one hand, RA has been used for decades, but there a... Read More about Linear viscoelastic properties of high reclaimed asphalt content mixes with biobinders.

Moisture damage evaluation of aggregate–bitumen bonds with the respect of moisture absorption, tensile strength and failure surface (2017)
Journal Article
Zhang, J., Airey, G. D., Grenfell, J., & Apeagyei, A. K. (in press). Moisture damage evaluation of aggregate–bitumen bonds with the respect of moisture absorption, tensile strength and failure surface. Road Materials and Pavement Design, 18(4), https://doi.org/10.1080/14680629.2017.1286441

The moisture-induced deterioration of asphalt mixture is because of the loss of adhesion at the aggregate–bitumen interface and/or the loss of cohesion within the bitumen film. An experimental study was undertaken in this paper to characterise the ef... Read More about Moisture damage evaluation of aggregate–bitumen bonds with the respect of moisture absorption, tensile strength and failure surface.

Structural design of pavements incorporating foamed bitumen mixtures (2017)
Journal Article
Kuna, K., Airey, G., & Thom, N. (in press). Structural design of pavements incorporating foamed bitumen mixtures. Proceedings of the ICE - Construction Materials, https://doi.org/10.1680/jcoma.16.00039

This paper presents a rational structural design methodology termed the ‘cumulative damage approach’ for road, port and airport pavements incorporating cold bituminous mixtures with foamed bitumen. This has been developed along with a laboratory test... Read More about Structural design of pavements incorporating foamed bitumen mixtures.

Moisture sensitivity examination of asphalt mixtures using thermodynamic, direct adhesion peel and compacted mixture mechanical tests (2016)
Journal Article
Zhang, J., Airey, G. D., Grenfell, J., & Apeagyei, A. K. (2018). Moisture sensitivity examination of asphalt mixtures using thermodynamic, direct adhesion peel and compacted mixture mechanical tests. Road Materials and Pavement Design, 19(1), 120-138. https://doi.org/10.1080/14680629.2016.1249510

Moisture damage in asphalt mixtures is a complicated mode of pavement distress that results in the loss of stiffness and structural strength of the asphalt pavement layers. This paper evaluated the moisture sensitivity of different aggregate–bitumen... Read More about Moisture sensitivity examination of asphalt mixtures using thermodynamic, direct adhesion peel and compacted mixture mechanical tests.

Active fillers’ effect on in situ performances of foam bitumen recycled mixtures (2016)
Journal Article
Betti, G., Airey, G., Jenkins, K., Marradi, A., & Tebaldi, G. (in press). Active fillers’ effect on in situ performances of foam bitumen recycled mixtures. Road Materials and Pavement Design, 18(2), https://doi.org/10.1080/14680629.2016.1213486

Cold recycling is one of the most employed rehabilitation techniques for asphalt pavements and it is becoming more and more important as reducing emissions becomes a priority in the reduction of the greenhouse effect. The main advantages of asphalt c... Read More about Active fillers’ effect on in situ performances of foam bitumen recycled mixtures.

Development of a tool to assess in-situ curing of Foamed Bitumen Mixtures (2016)
Journal Article
Kuna, K., Airey, G., & Thom, N. (2016). Development of a tool to assess in-situ curing of Foamed Bitumen Mixtures. Construction and Building Materials, 124, https://doi.org/10.1016/j.conbuildmat.2016.07.086

This paper discusses the simplest yet crucial mix design consideration of Foamed Bitumen Mixtures (FBMs); curing. The objective of the present study is to attain better understanding of the curing mechanism of FBMs and lessen the gap between laborato... Read More about Development of a tool to assess in-situ curing of Foamed Bitumen Mixtures.

Linear and nonlinear fractional hereditary constitutive laws of asphalt mixtures (2016)
Journal Article
Di Mino, G., AIREY, G., Di Paola, M., Pinnola, F. P., D’Angelo, G., & LO PRESTI, D. (2016). Linear and nonlinear fractional hereditary constitutive laws of asphalt mixtures. Journal of Civil Engineering and Management, 22(7), 882-889. https://doi.org/10.3846/13923730.2014.914104

The aim of this paper is to propose a fractional viscoelastic and viscoplastic model of asphalt mixtures using experimental data of several tests such as creep and creep recovery performed at different temperatures and at different stress levels. Fro... Read More about Linear and nonlinear fractional hereditary constitutive laws of asphalt mixtures.

Towards 100% recycling of reclaimed asphalt in road surface courses: Binder design methodology and case studies (2016)
Journal Article
Lo Presti, D., Jiménez Del Barco Carrión, A., Airey, G., & Hajj, E. (2016). Towards 100% recycling of reclaimed asphalt in road surface courses: Binder design methodology and case studies. Journal of Cleaner Production, 131, 43-51. https://doi.org/10.1016/j.jclepro.2016.05.093

Reclaimed Asphalt (RA) has shown great potential to be reused in new asphalt mixtures, however its incorporation in top asphalt pavement layers is still very limited (10-30%). In fact, despite the advantages that its use implies, RA content in road p... Read More about Towards 100% recycling of reclaimed asphalt in road surface courses: Binder design methodology and case studies.

Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders (2016)
Journal Article
Airey, G. D., Grenfell, J., Apeagyei, A., Subhy, A., & Lo Presti, D. (in press). Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders. Mechanics of Time-Dependent Materials, 20(3), 455-480. https://doi.org/10.1007/s11043-016-9295-y

Bitumen is a viscoelastic material that exhibits both elastic and viscous components of response and displays both a temperature and time dependent relationship between applied stresses and resultant strains. In addition, as bitumen is responsible fo... Read More about Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders.

Development of a composite substrate peel test to assess moisture sensitivity of aggregate–bitumen bonds (2016)
Journal Article
Zhang, J., Airey, G. D., Grenfell, J., Apeagyei, A. K., & Barrett, M. (2016). Development of a composite substrate peel test to assess moisture sensitivity of aggregate–bitumen bonds. International Journal of Adhesion and Adhesives, 68, https://doi.org/10.1016/j.ijadhadh.2016.02.013

This paper presents the development of a suitable procedure to prepare peel test specimens using coarse aggregates and compare the results with the established standard peel test. The newly developed composite substrate peel test (CSPT) was found to... Read More about Development of a composite substrate peel test to assess moisture sensitivity of aggregate–bitumen bonds.

Chemical pavement modifications to reduce ice adhesion (2016)
Journal Article
Wright, M., Parry, T., & Airey, G. (in press). Chemical pavement modifications to reduce ice adhesion. Proceedings of the ICE - Transport, 169(2), https://doi.org/10.1680/jtran.14.00053

The formation of ice and snow on road pavement surfaces is a recurring problem, creating hazardous driving conditions, restricting public mobility as well as having adverse economic effects. It would be desirable to develop new and improved ways of m... Read More about Chemical pavement modifications to reduce ice adhesion.

Mix design considerations of foamed bitumen mixtures with reclaimed asphalt pavement material (2016)
Journal Article
Kuna, K., Airey, G., & Thom, N. (in press). Mix design considerations of foamed bitumen mixtures with reclaimed asphalt pavement material. International Journal of Pavement Engineering, https://doi.org/10.1080/10298436.2015.1126271

In the present work, a mix design parametric study was carried out with the aim of proposing a practical and consistent mix design procedure for foamed bitumen mixtures (FBMs). The mix design parameters that were adopted in the study are mixing and c... Read More about Mix design considerations of foamed bitumen mixtures with reclaimed asphalt pavement material.

Effect of aggregate gradation on the stiffness of asphalt mixtures (2015)
Journal Article
Al-Mosawe, H., Thom, N., Airey, G., & Ai-Bayati, A. (2015). Effect of aggregate gradation on the stiffness of asphalt mixtures. International Journal of Pavement Engineering and Asphalt Technology, 16(2), https://doi.org/10.1515/ijpeat-2015-0008

Aggregate gradation plays an important role in the behaviour of asphalt mixtures. Packing of aggregate is a very important factor that will be affected by changing the aggregate gradation. Many researchers have investigated different ways of describi... Read More about Effect of aggregate gradation on the stiffness of asphalt mixtures.

Rubberised bitumen manufacturing assisted by rheological measurements (2015)
Journal Article
Subhy, A., Subhy, A., Lo Presti, D., & Airey, G. (2016). Rubberised bitumen manufacturing assisted by rheological measurements. Road Materials and Pavement Design, 17(2), 290-310. https://doi.org/10.1080/14680629.2015.1079549

This paper investigates the effect of processing temperature and time on the rheological properties of recycled tyre rubber-modified bitumens (RTR-MBs) produced using two different base binders and an ambient ground crumb rubber modifier (CRM). The p... Read More about Rubberised bitumen manufacturing assisted by rheological measurements.

Tests Campaign Analysis to Evaluate the Capability of Fragmentation Test to Characterize Recycled Asphalt Pavement (RAP) Material (2015)
Conference Proceeding
Perraton, D., Tebaldi, G., Dave, E., Bilodeau, F., Giacomello, G., Grilli, A., …Marsac, P. (2016). Tests Campaign Analysis to Evaluate the Capability of Fragmentation Test to Characterize Recycled Asphalt Pavement (RAP) Material. In F. Canestrari, & M. N. Partl (Eds.), 8th RILEM International Symposium on Testing and Characterization of Sustainable and Innovative Bituminous Materials (965-976). https://doi.org/10.1007/978-94-017-7342-3_77

Cold and hot recycling of reclaimed asphalt pavement (RAP) is increasingly gaining in popularity worldwide due to the need to increase the sustainability of asphalt pavement, both from environmental and economic perspectives. Despite the increasing o... Read More about Tests Campaign Analysis to Evaluate the Capability of Fragmentation Test to Characterize Recycled Asphalt Pavement (RAP) Material.

Experimental evaluation of cohesive and adhesive bond strength and fracture energy of bitumen-aggregate systems (2015)
Journal Article
Zhang, J., Airey, G. D., & Grenfell, J. R. (2016). Experimental evaluation of cohesive and adhesive bond strength and fracture energy of bitumen-aggregate systems. Materials and Structures, 49(7), 2653-2667. https://doi.org/10.1617/s11527-015-0674-7

Degradation of asphalt pavements is an inevitable phenomenon due to the combined effects of high traffic loads and harsh environmental conditions. Deterioration can be in the form of cohesive failure of the bitumen and/or bitumen-filler mastic or by... Read More about Experimental evaluation of cohesive and adhesive bond strength and fracture energy of bitumen-aggregate systems.

Influence of aggregate mineralogical composition on water resistance of aggregate–bitumen adhesion (2015)
Journal Article
Zhang, J., Apeagyei, A. K., Airey, G. D., & Grenfell, J. R. (2015). Influence of aggregate mineralogical composition on water resistance of aggregate–bitumen adhesion. International Journal of Adhesion and Adhesives, 62, https://doi.org/10.1016/j.ijadhadh.2015.06.012

The effects of aggregate mineralogical composition on moistures sensitivity of aggregate–bitumen bonds were investigated using four aggregate types (two limestone and two granite)and two bitumen grades (40/60 penand70/100pen). Moisture sensitivity... Read More about Influence of aggregate mineralogical composition on water resistance of aggregate–bitumen adhesion.

Chemically modified bitumens with enhanced rheology and adhesion properties to siliceous aggregates (2015)
Journal Article
Cuadri, A., Partal, P., Ahmad, N., Grenfell, J., & Airey, G. (2015). Chemically modified bitumens with enhanced rheology and adhesion properties to siliceous aggregates. Construction and Building Materials, 93, https://doi.org/10.1016/j.conbuildmat.2015.05.098

Moisture damage is one of the major premature failures that worsens the performance and shortens service life of pavements. This research assesses the effect that two chemical modifiers (thiourea and an isocyanate-functionalized castor oil prepolymer... Read More about Chemically modified bitumens with enhanced rheology and adhesion properties to siliceous aggregates.

Influence of aggregate absorption and diffusion properties on moisture damage in asphalt mixtures (2015)
Journal Article
Apeagyei, A. K., Grenfell, J. R., & Airey, G. (in press). Influence of aggregate absorption and diffusion properties on moisture damage in asphalt mixtures. Road Materials and Pavement Design, 16(sup1), https://doi.org/10.1080/14680629.2015.1030827

An experimental study was undertaken to characterise moisture sensitivity of asphalt mixtures by comparing certain physico-chemical properties of selected aggregates of different mineralogies to the moisture induced strength degradation of the aggreg... Read More about Influence of aggregate absorption and diffusion properties on moisture damage in asphalt mixtures.

An investigation on using pre-treated tyre rubber as a replacement of synthetic polymers for bitumen modification (2015)
Journal Article
Subhy, A., Lo Presti, D., & Airey, G. (in press). An investigation on using pre-treated tyre rubber as a replacement of synthetic polymers for bitumen modification. Road Materials and Pavement Design, 16, https://doi.org/10.1080/14680629.2015.1030826

Rubberized bitumen obtained through a swelling process, has widely proven to be a successful technology for asphalt pavement applications and a solution to reduce the dismantling of tyre rubber on landfills. However, this technology presents two main... Read More about An investigation on using pre-treated tyre rubber as a replacement of synthetic polymers for bitumen modification.

Binder design of high RAP content hot and warm asphalt mixture wearing courses (2015)
Journal Article
Barco Carrión, A., Lo Presti, D., & Airey, G. (2015). Binder design of high RAP content hot and warm asphalt mixture wearing courses. Road Materials and Pavement Design, 16, 460-474. https://doi.org/10.1080/14680629.2015.1029707

Reclaimed Asphalt Pavement (RAP) has shown great potential for being used in the construction or maintenance of roads. However, RAP is usually downgraded to lower pavement layers and the percentage of RAP used in wearing courses is still moderate (≤3... Read More about Binder design of high RAP content hot and warm asphalt mixture wearing courses.

Discrete element modelling of creep of asphalt mixtures (2015)
Journal Article
Cai, W., McDowell, G. R., Airey, G., & de Bono, J. P. (in press). Discrete element modelling of creep of asphalt mixtures. Geomechanics and Geoengineering, 11(1), https://doi.org/10.1080/17486025.2015.1006689

Creep tests on asphalt mixtures have been undertaken under four stress levels in the laboratory while the Discrete Element Model (DEM) has been used to simulate the laboratory tests. A modified Burger’s model has been used to represent the time-depen... Read More about Discrete element modelling of creep of asphalt mixtures.

Moisture damage assessment using surface energy, bitumen stripping and the SATS moisture conditioning procedure (2015)
Journal Article
Grenfell, J., Apeagyei, A. K., & Airey, G. (in press). Moisture damage assessment using surface energy, bitumen stripping and the SATS moisture conditioning procedure. International Journal of Pavement Engineering, 16(5), https://doi.org/10.1080/10298436.2015.1007235

Durability is one of the most important properties of an asphalt mixture. A key factor affecting the durability of asphalt pavements is moisture damage. Moisture damage generally results in the loss of strength of the mixture due to two main mechanis... Read More about Moisture damage assessment using surface energy, bitumen stripping and the SATS moisture conditioning procedure.

Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste (2015)
Journal Article
Gómez-Meijide, B., Pérez, I., Airey, G., & Thom, N. (2015). Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste. Construction and Building Materials, 77, 168-178. https://doi.org/10.1016/j.conbuildmat.2014.12.045

The stiffness of cold asphalt mixtures (CAM) with 100% recycled construction and demolition waste aggregates (CDWA) was studied from three different points of view: the indirect tensile stiffness modulus (ITSM), the dynamic modulus at different tempe... Read More about Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste.

Influence of waxes on adhesion properties of bituminous binders (2014)
Journal Article
Lamperti, R., Grenfell, J., Sangiorgi, C., Lantieri, C., & Airey, G. D. (2015). Influence of waxes on adhesion properties of bituminous binders. Construction and Building Materials, 76, https://doi.org/10.1016/j.conbuildmat.2014.11.058

The benefits at the base of WMA technologies are well established in the literature. They include the reduction in the energy consumption during the production of mixtures, the reduction in the emissions to the atmosphere in the production plant and... Read More about Influence of waxes on adhesion properties of bituminous binders.

A study into the use of crumb rubber in railway ballast (2014)
Journal Article
Sol-Sánchez, M., Thom, N., Moreno-Navarro, F., Rubio-Gámeza, M., & Airey, G. (2015). A study into the use of crumb rubber in railway ballast. Construction and Building Materials, 75, 19-24. https://doi.org/10.1016/j.conbuildmat.2014.10.045

Ballasted track is the most common form of construction used in railway transportation due to a number of benefits in comparison with other solutions such as slab track. However, the degradation of the ballast particles and the layer settlement lead... Read More about A study into the use of crumb rubber in railway ballast.

Accelerated swell testing of artificial sulfate bearing lime stabilised cohesive soils (2014)
Journal Article
Buttress, A. J., Grenfell, J., & Airey, G. (2015). Accelerated swell testing of artificial sulfate bearing lime stabilised cohesive soils. Materials and Structures, 48(11), 3635-3655. https://doi.org/10.1617/s11527-014-0428-y

This paper reports on the physico-chemical response of two lime stabilised sulfate bearing artificial soils subject to the European Accelerated Volumetric Swell Test (EN13286-49). At various intervals during the test, a specimen was removed and subje... Read More about Accelerated swell testing of artificial sulfate bearing lime stabilised cohesive soils.

Moisture-induced strength degradation of aggregate-asphalt mastic bonds (2014)
Journal Article
Apeagyei, A. K., Grenfell, J., & Airey, G. (in press). Moisture-induced strength degradation of aggregate-asphalt mastic bonds. Road Materials and Pavement Design, 15(S1), https://doi.org/10.1080/14680629.2014.927951

A common manifestation of moisture-induced damage in asphalt mixtures is the loss of adhesion at the aggregate–asphalt mastic interface and/or cohesion within the bulk mastic. This paper investigates the effects of moisture on the aggregate–mastic in... Read More about Moisture-induced strength degradation of aggregate-asphalt mastic bonds.

Mechanical and structural assessment of laboratory- and field-compacted asphalt mixtures (2014)
Journal Article
Airey, G., & Collop, A. (in press). Mechanical and structural assessment of laboratory- and field-compacted asphalt mixtures. International Journal of Pavement Engineering, 17(1), https://doi.org/10.1080/10298436.2014.925551

Compaction forms an integral part in the formation of the aggregate orientation and structure of an asphalt mixture and therefore has a profound influence on its final volumetric and mechanical performance. This article describes the influence of var... Read More about Mechanical and structural assessment of laboratory- and field-compacted asphalt mixtures.

Alternative methodologies to evaluate storage stability of rubberised bitumens (2014)
Conference Proceeding
Lo Presti, D., Memon, N., Grenfell, J., & Airey, G. (2014). Alternative methodologies to evaluate storage stability of rubberised bitumens. In Asphalt Pavements: Proceedings of the International Conference on Asphalt Pavements, ISAP 2014, 1481-1489. doi:10.1201/b17219-180

Tyre Rubber Modified Binders (TR-MBs), produced through the McDonald wet process and used worldwide (e.g. asphalt rubber), have demonstrated various benefits to pavements and, moreover, they represent a good opportunity for recycling tyre rubber. How... Read More about Alternative methodologies to evaluate storage stability of rubberised bitumens.

Toward more realistic viscosity measurements of tyre rubber–bitumen blends (2014)
Journal Article
Lo Presti, D., Fecarotti, C., Clare, A. T., & Airey, G. (2014). Toward more realistic viscosity measurements of tyre rubber–bitumen blends. Construction and Building Materials, 67, 270-278. https://doi.org/10.1016/j.conbuildmat.2014.03.038

The measurement of rheological properties of the tyre rubber bitumen blends is often challenging due to presence of suspended tyre rubber’s crumbs. Furthermore, the phase separation during the course of measurements makes the viscosity of these non-h... Read More about Toward more realistic viscosity measurements of tyre rubber–bitumen blends.

Observation of reversible moisture damage in asphalt mixtures (2014)
Journal Article
Apeagyei, A. K., Grenfell, J., & Airey, G. (2014). Observation of reversible moisture damage in asphalt mixtures. Construction and Building Materials, 60(1), https://doi.org/10.1016/j.conbuildmat.2014.02.033

Application of Fickian and non-Fickian diffusion models to study moisture diffusion in asphalt mastics (2014)
Journal Article
Apeagyei, A. K., Grenfell, J., & Airey, G. (2015). Application of Fickian and non-Fickian diffusion models to study moisture diffusion in asphalt mastics. Materials and Structures, 48(5), https://doi.org/10.1617/s11527-014-0246-2

The objective of this study was to investigate certain aspects of asphalt mastic moisture diffusion characteristics in order to better understand the moisture damage phenomenon in asphalt mixtures. Moisture sorption experiments were conducted on four... Read More about Application of Fickian and non-Fickian diffusion models to study moisture diffusion in asphalt mastics.

Laboratory mix design of asphalt mixture containing reclaimed material (2014)
Journal Article
Collop, A., Abdul Hassan, N., Khan, R., Lo Presti, D., Khan, R., Hassan, N. A., …Collop, A. (2014). Laboratory mix design of asphalt mixture containing reclaimed material. Advances in Materials Science and Engineering, 2014(507082), https://doi.org/10.1155/2014/507082

This paper presents a study on the production of asphalt test specimens in the laboratory containing reclaimed asphalt. The mixtures considered were stone mastic asphalt concrete mixtures containing up to 30% of reclaimed asphalt. Specimens were comp... Read More about Laboratory mix design of asphalt mixture containing reclaimed material.

Reclaimed asphalt test specimen preparation assisted by image analysis (2014)
Journal Article
Lo Presti, D., Hassan, N. A., Khan, R., & Airey, G. (2015). Reclaimed asphalt test specimen preparation assisted by image analysis. Journal of Materials in Civil Engineering, 27(8), Article C4014005. https://doi.org/10.1061/%28ASCE%29MT.1943-5533.0001012

This paper presents a laboratory investigation aimed at establishing a protocol for the production of homogeneous asphalt mixtures test specimens, incorporating reclaimed asphalt by using a gyratory compactor with coring and trimming works. Stone mas... Read More about Reclaimed asphalt test specimen preparation assisted by image analysis.

Assessing asphalt mixture moisture susceptibility through intrinsic adhesion, bitumen stripping and mechanical damage (2013)
Journal Article
Grenfell, J., Ahmad, N., Liu, Y., Apeagyei, A. K., Large, D., & Airey, G. (2014). Assessing asphalt mixture moisture susceptibility through intrinsic adhesion, bitumen stripping and mechanical damage. Road Materials and Pavement Design, 15(1), 131-152. https://doi.org/10.1080/14680629.2013.863162

Durability is one of the most important properties of an asphalt mixture. A key factor affecting the durability of asphalt pavements is moisture damage. Moisture damage is generally considered to be the result of two main mechanisms; the loss of adhe... Read More about Assessing asphalt mixture moisture susceptibility through intrinsic adhesion, bitumen stripping and mechanical damage.

Examination of moisture sensitivity of aggregate-bitumen bonding strength using loose asphalt mixture and physico-chemical surface energy property tests (2013)
Journal Article
Liu, Y., Apeagyei, A. K., Ahmad, N., Grenfell, J., & Airey, G. (2014). Examination of moisture sensitivity of aggregate-bitumen bonding strength using loose asphalt mixture and physico-chemical surface energy property tests. International Journal of Pavement Engineering, 15(7), 657-670. https://doi.org/10.1080/10298436.2013.855312

In this study, the moisture sensitivity of different kinds of aggregates and bituminous binders is examined by comparing the performance between five empirical test methods for loose mixtures - static immersion test, rolling bottle test (RBT), boilin... Read More about Examination of moisture sensitivity of aggregate-bitumen bonding strength using loose asphalt mixture and physico-chemical surface energy property tests.

Tyre rubber-modified bitumens development: the effect of varying processing conditions (2013)
Journal Article
Lo Presti, D., & Airey, G. (2013). Tyre rubber-modified bitumens development: the effect of varying processing conditions. Road Materials and Pavement Design, 14(4), 888-900. doi:10.1080/14680629.2013.837837

Tyre rubber-modified binders (TR-MBs), produced through McDonald's wet process and used worldwide (e.g. asphalt rubber), have been demonstrated to provide various benefits to pavements and, moreover, they represent a good opportunity for recycling ty... Read More about Tyre rubber-modified bitumens development: the effect of varying processing conditions.

The role of ettringite in the deterioration of artificial lime stabilised soils: a microstructural study (2013)
Journal Article
Buttress, A., Grenfell, J., & Airey, G. (2013). The role of ettringite in the deterioration of artificial lime stabilised soils: a microstructural study. Road Materials and Pavement Design, 14(3), https://doi.org/10.1080/14680629.2013.779306

The formation of ettringite has been defined as a major failure mechanism of lime stabilised cohesive soils. It can result in both disruptive volumetric changes and loss of mechanical strength. The mechanisms of its formation and the role it plays in... Read More about The role of ettringite in the deterioration of artificial lime stabilised soils: a microstructural study.

Evaluation of moisture sorption and diffusion characteristics of asphalt mastics using manual and automated gravimetric sorption techniques (2013)
Journal Article
Apeagyei, A. K., Grenfell, J., & Airey, G. (2014). Evaluation of moisture sorption and diffusion characteristics of asphalt mastics using manual and automated gravimetric sorption techniques. Journal of Materials in Civil Engineering, 26(8), Article 04014045. https://doi.org/10.1061/%28ASCE%29MT.1943-5533.0000929

One of the most important factors influencing the durability of asphalt mixtures is moisture-induced damage resulting from the presence and the transport of moisture in pavements. Moisture-induced damage is an extremely complicated phenomenon that is... Read More about Evaluation of moisture sorption and diffusion characteristics of asphalt mastics using manual and automated gravimetric sorption techniques.

Fundamental characterisation of reclaimed asphalts: the importance of testing homogeneous specimens (2013)
Journal Article
Lo Presti, D., Hassan, N., Airey, G., & Collop, A. (2013). Fundamental characterisation of reclaimed asphalts: the importance of testing homogeneous specimens. Road Materials and Pavement Design, 14(SUPPL.1), 120-131. doi:10.1080/14680629.2013.774750

This study highlights the importance of defining appropriate specimen manufacturing procedures when assessing the fundamental properties of reclaimed asphalt (RA) mixes for further modelling purposes. Two gyratory compactor procedures were used: the... Read More about Fundamental characterisation of reclaimed asphalts: the importance of testing homogeneous specimens.

Mechanical characterisation of reclaimed asphalt mixes for modelling purposes (2012)
Presentation / Conference
Lo Presti, D., Brown, L., Kranthi, K., Grenfell, J., Airey, G., Collop, A., & Scarpas, T. (2012, August). Mechanical characterisation of reclaimed asphalt mixes for modelling purposes. Paper presented at Seventh International Conference on Maintenance and Rehabilitation of Pavements and Technological Control

Reclaimed Asphalt (RA) is a 100% recyclable material, but at present in Europe the re-use of RA in mixes is limited and a huge amount of it is simply wasted. Furthermore, the recycling of asphalt often involves a certain downgrading of the material.... Read More about Mechanical characterisation of reclaimed asphalt mixes for modelling purposes.