Estimation of Resilient Modulus Constitutive Model Parameters for Unbound Coarse Materials for MEPDG
Publication: Journal of Transportation Engineering, Part B: Pavements
Volume 148, Issue 3
Abstract
In this study, 18 different unbound aggregates were collected from various locations of Idaho and several characterization tests were conducted in the laboratory. The resilient modulus of these collected aggregates was measured with the help of repeated load triaxial (RLT) testing. The results of the laboratory characterization tests were used to develop a regression model for the Mechanistic Empirical Pavement Design Guide (MEPDG) model parameters (e.g., , , ). The , , and models were correlated to compaction and gradation characteristics of the test aggregates. The proposed models can be used to predict the MEPDG model regression coefficients for unbound layers in AASHTOWare Pavement ME Design software. The resilient modulus measured in the laboratory and the resilient modulus predicted with these models are found to be in good agreement.
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Data Availability Statement
All data, such as the resilient modulus of the aggregate at different stress states (both internally and externally measured), the aggregate characteristics properties (provided in Table 2), etc., that support the findings of this study are available from the corresponding author upon reasonable request.
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Published In
Journal of Transportation Engineering, Part B: Pavements
Volume 148 • Issue 3 • September 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Jun 10, 2021
Accepted: Feb 13, 2022
Published online: May 26, 2022
Published in print: Sep 1, 2022
Discussion open until: Oct 26, 2022
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