Characterization of Asphalt Mix Response under Repeated Loading Using Anisotropic Nonlinear Viscoelastic-Viscoplastic Model
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 10
Abstract
Asphalt mixes exhibit a viscoelastic-viscoplastic behavior, and the contribution of the different constitutive components depends on the temperature and rate of loading. This paper presents an anisotropic nonlinear viscoelastic-viscoplastic model for asphalt mixes. The influence of the anisotropic aggregate distribution is accounted for in both the viscoelastic and viscoplastic responses. The model’s parameters were determined based on the analysis of repeated creep triaxial tests on three asphalt mixes that included aggregates with different characteristics. The paper discusses the experimental factors that need to be considered in conducting the repeated creep tests in order to determine the model’s viscoelastic and viscoplastic parameters. It also discusses the relationship between these parameters and mix properties. The results show that the mix nonlinear viscoelastic response, hardening, dilation or contraction behavior, and damage depend on aggregate properties.
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Acknowledgments
The writers would like to acknowledge the financial support of the Federal Highway Administration and the International Center for Aggregate Research for the research documented in this paper.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 19 • Issue 10 • October 2007
Pages: 912 - 924
Copyright
© 2007 ASCE.
History
Received: Feb 7, 2006
Accepted: Mar 5, 2007
Published online: Oct 1, 2007
Published in print: Oct 2007
Notes
Note. Associate Editor: Mary Stroup-Gardiner
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