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Rubberised stone mastic asphalt mixtures: a performance-related evaluation

Subhy, Ayad; Lo Presti, Davide; Airey, Gordon; Edwards, Paul

Authors

Ayad Subhy

Davide Lo Presti

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GORDON AIREY GORDON.AIREY@NOTTINGHAM.AC.UK
Professor of Pavement Engineering Materials

Paul Edwards



Abstract

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. This study presents the results of performance evaluation conducted on different rubberised Stone Mastic Asphalt (SMA) mixtures produced using different types and contents of rubberised bitumen. The energy ratio (ER) computed from Superpave Indirect Tensile (IDT) tests was used to evaluate the cracking resistance of asphalt mixtures while the rutting behaviour was evaluated using the Repeated Load Axial Test (RLAT). The indirect tensile stiffness and strength were used to evaluate the moisture susceptibility. Using the same binder content for rubberised SMA mixtures as used in the conventional mixtures can still give superior performance properties. Adding crumb rubber to softer base bitumencan produce asphalt mixtures with superior cracking and rutting resistance.

Citation

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

Journal Article Type Article
Acceptance Date Oct 11, 2022
Online Publication Date Oct 31, 2022
Publication Date 2023
Deposit Date May 5, 2023
Publicly Available Date Nov 1, 2023
Journal Road Materials and Pavement Design
Print ISSN 1468-0629
Electronic ISSN 2164-7402
Peer Reviewed Peer Reviewed
Volume 24
Issue 9
Pages 2280-2300
DOI https://doi.org/10.1080/14680629.2022.2136580
Keywords Stone mastic asphalt; rubber; fatigue; rutting; moisture susceptibility
Public URL https://nottingham-repository.worktribe.com/output/14025710
Publisher URL https://www.tandfonline.com/doi/full/10.1080/14680629.2022.2136580

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