Static Creep and Repeated Load as Rutting Performance Tests for Airport HMA Mix Design
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 9
Abstract
A performance test, rather than an empirical test, to evaluate rutting susceptibility is needed to accompany current volumetric property requirements of airport hot mix asphalt (HMA) designed using a superpave gyratory compactor. The new performance test will provide a level of confidence that pavement constructed using a selected HMA mixture will function according to its design. This paper presents results from a laboratory study to identify a performance test for accepting hot asphalt mixtures for constructing airport pavements designed for high tire pressure traffic. Performance tests intended to indicate rutting susceptibility were performed on 34 HMA mixtures. Twenty-nine of these mixtures met all aggregate and volumetric property requirements for airport pavement construction; the remaining five mixtures were designed with excessive percentage of natural sand (30%) as rut-susceptible mixtures. Results from asphalt pavement analyzer (APA), triaxial static creep, and triaxial repeated load tests are presented. Statistical analyses performed on the results indicate that the rate of increase in permanent strain and the flow time value determined from triaxial static creep testing provide the strongest correlation to APA simulated traffic rutting.
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Acknowledgments
The study described in this paper was supported by the FAA Airport Technology Research and Development Branch under the FAA-ERDC Interagency Agreement. The authors would like to thank Mr. Tim McCaffrey, Mr. Kevin Taylor, and Mr. Lance Warnock of the United States Army Engineer Research and Development Center for their efforts with the specimen preparation and laboratory testing. The contents of the paper reflect the views of the authors, who are responsible for the facts and accuracy of the data presented within. The contents do not necessarily reflect the official views and policies of the FAA, the Engineer Research and Development Center, Department of the Army, or the Department of Defense. The paper does not constitute a standard, specification, or regulation. Permission to publish was granted by Director, Geotechnical and Structures Laboratory.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 9 • September 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 6, 2013
Accepted: Oct 7, 2013
Published online: Oct 9, 2013
Published in print: Sep 1, 2014
Discussion open until: Oct 13, 2014
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