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Evaluation of Short-Term Aging Protocol for Asphalt Mixtures

1
Department of Civil & Architectural Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
2
LS Engineering and Consultant, Franklin, ACT 2913, Australia
3
Department of Civil Engineering, University of Idaho, Moscow, ID 83844-1022, USA
4
WSP Australia, Canberra, ACT 2600, Australia
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(14), 2783; https://doi.org/10.3390/app9142783
Received: 25 May 2019 / Revised: 5 July 2019 / Accepted: 5 July 2019 / Published: 10 July 2019
(This article belongs to the Section Civil Engineering)
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Abstract

Asphalt mixtures are subjected to short-term aging during the production, placement, and compaction processes. Proper evaluation of asphalt pavement performance relies on the accurate characterization of asphalt mixtures during the design stage. In this study, three different loose asphalt mixtures often used in Qatar were evaluated to develop a laboratory short-term aging procedure. Sample mixtures 1 and 3 were collected from a construction site, while mixture 2 was obtained from an asphalt plant. Virgin aggregates and binders were also collected to reproduce the mixtures in the laboratory. Laboratory-produced mixtures were conditioned at 135 °C using various time durations. The mechanical properties of laboratory-produced mixtures were compared to those of mixtures produced on site. The results of the mechanical and binder testing demonstrated that the proper short-term aging protocol for asphalt mixtures often used in road construction in the State of Qatar would involve heating asphalt mixtures for 4 h at 135 °C before laboratory compaction. View Full-Text
Keywords: asphalt mixture; short-term aging; dynamic modulus; superpave binder testing; asphalt mixture performance tester (AMPT) asphalt mixture; short-term aging; dynamic modulus; superpave binder testing; asphalt mixture performance tester (AMPT)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sirin, O.; Paul, D.K.; Kassem, E.; Ohiduzzaman, M. Evaluation of Short-Term Aging Protocol for Asphalt Mixtures. Appl. Sci. 2019, 9, 2783.

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