Modeling Pavement Temperature for Use in Binder Oxidation Models and Pavement Performance Prediction
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 4
Abstract
The ability to accurately predict pavement temperature variation with time and depth is critical to calculating binder oxidation in pavements, understanding asphalt material behavior, and predicting pavement performance. In this work, an improved one-dimensional model, coupled with methods to obtain model-required climate data from available databases and optimization of site-specific pavement parameters was developed to calculate hourly pavement temperatures nationwide. Hourly solar radiation and daily average wind speed were obtained from existing databases. Hourly air temperatures were interpolated using a daily air temperature pattern developed from time-series analysis and commonly recorded daily maximum and minimum air temperatures. Parameter estimation identified three critical site-specific pavement parameters: the albedo, the difference between the emissivity and absorption coefficient, and the absorption coefficient. The values of these parameters, optimized at 29 pavement sites nationwide based on the average hourly absolute error objective function, appear to correlate with climatic patterns, suggesting that these parameters be interpolated based on climate. The temperature model, proposed data sources, and site-specific pavement parameters provided calculations that agreed well with experimental measurements.
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Acknowledgments
The writers gratefully acknowledge the support of the TXDOTTexas Department of Transportation and the FHAFederal Highway Administration Asphalt Research Consortium for funding this work. This work was conducted through the Center for Asphalt and Materials Chemistry, a center of the Texas Transportation Institute.
Disclaimer: This research was performed in cooperation with the Texas Department of Transportation (TxDOT) and the U.S. Department of Transportation, and the Federal Highway Administration (FHWA). The contents of this report reflect the views of the writers, who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official view or policies of the FHWA or TxDOT. This report does not constitute a standard, specification, or regulation, nor is it intended for construction, bidding, or permit purposes. Trade names are used solely for information and not for product endorsement.
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© 2011 American Society of Civil Engineers.
History
Received: Jul 13, 2009
Accepted: Sep 16, 2010
Published online: Mar 15, 2011
Published in print: Apr 1, 2011
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