Rubberised stone mastic asphalt mixtures: a performance-related evaluation

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

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
• Publisher: Taylor and Francis
• 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