Two-Dimensional Stress Analysis of Low-Temperature Cracking in Asphalt Overlay/Substrate Systems
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 9
Abstract
Low-temperature cracking of an asphalt pavement is caused by the deformation mismatch between the asphalt overlay layer and the underlying pavement layer in cold climates or where rapid temperature change exists. When longitudinal tensile stress in the overlay reaches a certain level, transverse cracks will initiate at the surface to release the energy stored in the asphalt material. When crack spacing reduces to a certain value, crack density becomes saturated and no new cracks will form. The fracture behavior significantly changes with the properties of the underlying layer and the interface. A recently developed theory of stress transfer is used to obtain a closed-form solution for the elastic field in an asphalt overlay fully bonded to the underlying layer, based on the periodic boundary-value problem. Using the correspondence principle, the formulation is extended to consider the viscoelastic material behavior of asphalt materials, so that the time-dependent material behavior of asphalt pavements under climate change can be analyzed. The modeling results compare well with finite-element results. The analytical solution can be used in the simulation of low-temperature cracking of asphalt pavements under extreme temperature conditions.
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Acknowledgments
This work is sponsored by the National Science Foundation CMMI 0954717 and the Department of Homeland Security CU09-1155, whose support is gratefully acknowledged. The results and opinions presented in this study are those of the authors and do not necessarily reflect those of the sponsoring agency. The authors are also grateful for the help of Drs. M. P. Wagoner, E. Dave, and A. Braham for taking the photos of asphalt pavements. Especially, we thank Dr. E. Dave for sharing the experimental data and finite-element input data.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 9 • September 2013
Pages: 1228 - 1238
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 25, 2012
Accepted: Oct 11, 2012
Published online: Oct 13, 2012
Discussion open until: Mar 13, 2013
Published in print: Sep 1, 2013
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