Combined Effect of Loading Pattern, Pulse Duration, and Stress Level on the Cyclic Creep Test of Asphalt Mixture
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 1
Abstract
In this research work, based on the permanent strain mechanisms, the behavior of asphalt mixture under different loading conditions was examined in a cyclic compression creep test. This research study was conducted with three loading patterns at three pulse durations and stress levels. The results show the following: (1) the permanent strain mechanisms are strongly affected by stress level, pulse duration, loading patterns, and their interactions; (2) the rate of change in permanent strain from stress at a low stress level is significantly higher than that at a high stress level; (3) asphalt specimens with higher initial strain will show a lower rate of rutting progression as the number of load applications increases; (4) at a pulse duration corresponding to low speed, the asphalt specimen shows permanent strain over a shorter period of time, but at high speed this condition is dependent on stress level; (5) cumulative permanent strain is not linearly proportional to stress level for all loading conditions; and (6) at a low stress level, permanent strain of asphalt specimens will occur over a longer time period than that at a high stress level.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 1 • January 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jun 25, 2015
Accepted: Jun 15, 2016
Published online: Aug 2, 2016
Published in print: Jan 1, 2017
Discussion open until: Jan 2, 2017
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