Title

Low temperature cracking potential of aged asphalts using simulated aging techniques

Document Type

Conference Proceeding

Publication Date

10-4-2011

Abstract

The objective of this paper is to characterize low temperature properties of RAP binders and artificially-aged asphalt binders. The Rolling Thin Film Oven (RTFO) and Pressure Aging Vessel (PAV) were used to artificially age the asphalt binders with the binder undergoing up to three PAV aging cycles. Low temperature asphalt binder properties were investigated using the Asphalt Binder Cracking Device (ABCD). RAP binder specimens included a 50 RAP binder blend with a virgin PG 58-28 control binder. The ABCD determined the strain jump indicating the temperature where asphalt binder thermal cracking occurred. An average 5.9 difference in thermal cracking temperature was observed when comparing the control binder versus artificially-aged binders. Conclusions reached from this investigation are that RAP binder thermal cracking temperature and strain increases with additional amounts of RAP binder and RAP binder thermal cracking temperatures were similar to one or two PAV aging cycles. © 2011 ASCE.

Publication Title

ICCTP 2011: Towards Sustainable Transportation Systems - Proceedings of the 11th International Conference of Chinese Transportation Professionals

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