Evaluation and Modeling of Repeated Load Test Data of Asphalt Concrete for Mechanistic-Empirical Pavement Design
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 11
Abstract
The Mechanistic-Empirical Pavement Design Guide (MEPDG) made available by the National Cooperative Highway Research Program in 2004 uses a power model that incorporates dynamic modulus (DM) as a factor in predicting rutting performance of asphalt concrete. The rutting model is empirical and the rutting profiles obtained from the model are based largely on the adjustment of calibration constants, not the DM. Various DM values would be capable of producing similar rutting profiles based on the current model. This study evaluates using accumulated strain data obtained from the Repeated Load Test (RLT) as an alternative to using DM. In addition, a model to represent the accumulated strain data obtained from the RLT is developed. The accuracy and behavior of the current model and the model developed in this study in representing a mix from Louisiana are compared. Alternatives for incorporating the RLT data into the MEPDG are also presented.
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References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 19 • Issue 11 • November 2007
Pages: 993 - 999
Copyright
© 2007 ASCE.
History
Received: May 4, 2006
Accepted: Mar 5, 2007
Published online: Nov 1, 2007
Published in print: Nov 2007
Notes
Note. Associate Editor: Mary Stroup-Gardiner
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