Evaluation of high RAP-WMA asphalt rubber mixtures

Document Type

Conference Proceeding

Publication Date

12-1-2013

Abstract

This study focused on evaluating the stiffness, fatigue cracking, reflective cracking, rutting, moisture damage, and workability of asphalt rubber surface mixtures with RAP contents up to 40% with and without a WMA technology. RAP increased the stiffness of the mixtures; however, WMA mitigated that increase. The addition of RAP had an adverse effect on the resistance to fatigue and reflective cracking of the mixtures. This effect was magnified with the use of WMA regardless if RAP was incorporated in the mixture. Therefore it was recommended to further investigate the proper drop in temperatures for asphalt rubber mixtures that incorporate WMA. All mixtures passed the rutting and moisture damage test. The WMA technology improved the workability of the mixtures. © 2013 Taylor & Francis.

Publication Source (Journal or Book title)

Asphalt Paving Technology: Association of Asphalt Paving Technologists-Proceedings of the Technical Sessions

First Page

253

Last Page

287

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