Simplified Analytical Approach to Predicting Asphalt Pavement Temperature
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 12
Abstract
The temperature profile within the asphalt layer of a flexible pavement plays an important role in the design of hot-mix asphalt and in the performance models of asphalt concrete materials such as low-temperature cracking and asphalt binder oxidation. In this paper, the time-dependent temperature profile within an asphalt concrete layer is modeled as the heat conduction problem in a one-layer pavement system, where the surface boundary condition is simply the pavement surface-temperature history during the time period of interest. An infinite series solution for asphalt layer temperature prediction was derived using measured pavement surface temperatures. The main mathematical tools employed in deriving the analytical solution are separation of variables and Duhamel’s principle. Mathematically, the infinite series are proven to converge uniformly over the finite physical domain at a fixed time . Field validation based on measured in situ temperature data demonstrated that the proposed closed-form solution generated reasonable transient temperature profiles in the asphalt layer for a two-layer pavement system. The proposed algorithm is easy to be applied in assisting field engineers to rapidly estimate asphalt pavement temperature profiles based on measured pavement surface-temperature data.
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Acknowledgments
This research was performed while the author held a National Research Council Research Associateship Award at the Turner-Fairbank Highway Research Center, Federal Highway Administration.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 12 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Nov 16, 2012
Accepted: Apr 1, 2013
Published online: Apr 10, 2015
Discussion open until: Sep 10, 2015
Published in print: Dec 1, 2015
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