Date Approved

4-26-2006

Embargo Period

4-6-2016

Document Type

Thesis

Degree Name

M.S. in Civil Engineering

Department

Civil & Environmental Engineering

College

Henry M. Rowan College of Engineering

First Advisor

Mehta, Yusuf A.

Subject(s)

Pavements, Flexible; Asphalt concrete--Testing

Disciplines

Civil and Environmental Engineering

Abstract

The Mechanistic-Empirical Pavement Design Guide (MEPDG) 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 largely based 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 evaluated 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 was developed. The accuracy and behavior of the current model and the model developed in this study in representing a mix from Louisiana were compared. Alternatives for incorporating the RLT data into the MEPDG are also presented.

In addition, a conceptual framework for materials characterization of routinely used HMA mixtures was developed. The conceptual framework will aid state highway agencies in developing a mixture catalog that will help streamline the mix design process, it will also provide guidance in obtaining flexible pavement design inputs for the new MEPDG.

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