Creep Behavior of Hot-Mix Asphalt due to Heavy Vehicular Tire Loading
Publication: Journal of Engineering Mechanics
Volume 135, Issue 11
Abstract
The objective of this study is to characterize the creep behavior of hot-mix asphalt (HMA) at intermediate and at high temperatures . To accomplish this objective, a nonlinear time-hardening creep model, characterized through laboratory testing, was incorporated into a three-dimensional (3D) finite-element (FE) model, which was used to calculate permanent creep strains after applying repetitive vehicular loading cycles at the pavement surface. Two different tire configurations were simulated representing a typical dual-tire assembly and a newly introduced wide-base tire (dual-tire: 275/80R22.5 and wide-base tire: 455/55R22.5). Results of the 3D FE model were successfully verified against pavement response measurements in the field at the Virginia Smart Road. While the elastic or linear viscoelastic FE model may not simulate permanent deformation or shear creep strains after repetitions of vehicular loading, a nonlinear time-hardening creep model could predict primary rutting damage in HMA and shear creep strains at the edge of the tire imprint caused by different tire configurations.
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Acknowledgments
The financial support provided by the Michelin Americas Research and Development Corporation is greatly appreciated. The writers acknowledge the technical assistance from the National Center for Super Computing Applications (NCSA) at the University of Illinois at Urbana-Champaign.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 135 • Issue 11 • November 2009
Pages: 1265 - 1273
Copyright
© 2009 ASCE.
History
Received: Jan 23, 2007
Accepted: Jun 17, 2009
Published online: Oct 15, 2009
Published in print: Nov 2009
Notes
Note. Associate Editor: Dinesh R. Katti
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