Binder design of high RAP content hot and warm asphalt mixture wearing courses

Barco Carri�n, A.J.D.; Lo Presti, D.; Airey, G.D.

Abstract

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 (≤30%). The research and results contained in this paper focus on the definition of binder recipes aimed at increasing the percentage of RAP in hot and warm mix asphalt wearing courses. A review of current internationally used blend design methodologies is presented followed by case studies aimed at defining binder recipes for high RAP content asphalt mixture wearing courses to be further used for mix design and production in asphalt plants. Binder design has been carried out by means of rotational viscosity, Dynamic Shear Rheometer, Bending Beam Rheometer and conventional experimental tests with results showing that the amount of RAP used in a mix can be increased through the development of an accurate binder design and the selection of an appropriate rejuvenator. As a result, laboratory design showed that using up to 90% of RAP is a feasible option. However, the percentage of RAP to be used is highly dependent on the properties of the initial RAP binder, so every case has to be independently and carefully studied. The research presented is carried out as part of the CEDR Transnational Road research Programme Call 2012 (http://allback2pave.fehrl.org) and the Marie Curie Initial Training Network action, FP7-PEOPLE-2013-ITN (http://www.superitn.eu). © 2015 Taylor & Francis.

Citation

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

• Journal Article Type: Article
• Acceptance Date: Jan 23, 2015
• Online Publication Date: Apr 14, 2015
• Publication Date: Jul 1, 2015
• Deposit Date: Nov 23, 2018
• Print ISSN: 1468-0629
• Electronic ISSN: 2164-7402
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Volume: 16
• Pages: 460-474
• DOI: https://doi.org/10.1080/14680629.2015.1029707
• Keywords: binder; blend design; high RAP content; rejuvenator; warm mix; Asphalt; Asphalt pavements; Asphalt plants; Bending tests; Binders; Curricula; Design; Education; Ferroelectric materials; Mixtures; Rheometers; Bending beam rheometer; Design Methodology; Dyn
• Public URL: https://nottingham-repository.worktribe.com/output/1305018
• Publisher URL: https://www.tandfonline.com/doi/full/10.1080/14680629.2015.1029707
• Related Public URLs: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929946414&doi=10.1080%2f14680629.2015.1029707&partnerID=40&md5=05d84f03f99f48a315b225dfd490d46b