Effect of Strain Rate on Compressive Behavior and Modeling of Cement and Asphalt Mortar
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 3
Abstract
The compressive behavior of cement and asphalt mortar (CA mortar, including Types I and II CA mortar, namely CAI and CAII) under strain rates ranging from to was experimentally investigated using an electrohydraulic servo tester. The strain rate effects on the failure pattern, compressive strength, elastic modulus, and peak strain were studied. The results showed that the compressive strength and elastic modulus of CA mortar increased with increasing strain rate. The peak strain of CAI increased with the strain rate, whereas the peak strain of CAII showed a reverse tendency. At the same strain rate, the compressive strength, elastic modulus, and peak strain of CAI were smaller than those of CAII, but the strain rate sensitivity of the compressive behavior of CAI was stronger than that of CAII. A constitutive model involving the strain rate for CA mortar is proposed based on the theory of thermodynamics and damage mechanics.
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Acknowledgments
The authors would like to acknowledge the National Basic Research Program of China (973 Program) (Grant No. 2013CB036200), the National Natural Science Foundation of China (Grant Nos. 51278498 and 51590914) and the Postdoctoral Science Foundation of China (Grant No. 2015M580822) for financial support.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 3 • March 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Dec 21, 2016
Accepted: Aug 2, 2017
Published online: Jan 10, 2018
Published in print: Mar 1, 2018
Discussion open until: Jun 10, 2018
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