A practical approach to estimate the degree of binder activity of reclaimed asphalt materials

Menegusso Pires, Gustavo; Lo Presti, Davide; Airey, Gordon Dan

Abstract

© 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 RA have shown comparable properties and performance to that generally associated with asphalt mixtures made with 100% virgin material. However, RA content in pavement surface layers is still limited due to specification and technical limitations. For higher contents, the aged RA binder must be analysed to accurately determine the requirements for virgin binders and additives while the degree of blending (DOB) between the RA binder and the virgin binder also needs to be quantified. This is not a simple process and generally designers assume one of two opposing theories associated with 100% (full blending) or 0% (“Black Rock”) DOB. This paper proposes a new approach to estimate a unique property of the RA known as the Degree of Binder Activity (DoA) as a function of the processing temperatures of the RA. The study showed positive results and indicated that this DoA approach can be used as a tool to better understand RA in order to improve the binder/blend design for recycled asphalt mixtures.

Citation

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

• Journal Article Type: Article
• Acceptance Date: Aug 16, 2019
• Online Publication Date: Sep 12, 2019
• Publication Date: Sep 12, 2019
• Deposit Date: Oct 29, 2019
• Publicly Available Date: Sep 13, 2020
• Journal: Road Materials and Pavement Design
• Print ISSN: 1468-0629
• Electronic ISSN: 2164-7402
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Pages: 1-24
• DOI: https://doi.org/10.1080/14680629.2019.1663244
• Keywords: Civil and Structural Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/2984193
• Publisher URL: https://www.tandfonline.com/doi/full/10.1080/14680629.2019.1663244
• Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Road Materials and Pavement Design on 12/09/2019, available online: http://www.tandfonline.com/10.1080/14680629.2019.1663244.
• Contract Date: Oct 29, 2019