Evaluation of a new generation of asphalt treated mixtures

Document Type

Conference Proceeding

Publication Date

9-3-2010

Abstract

This paper summarizes the results of a study that was conducted to compare the performance of new generation asphalt treated base (ATB) mixtures to unbound granular materials (UGM) currently used in construction of base layers. A laboratory testing program was initially conducted on two types of ATB and UGM materials. The program included performing permanent deformation and resilient modulus repeated loading triaxial on the UGM materials. The dynamic modulus and flow number tests were used to examine the intermediate and high temperature response of the ATB mixtures under cyclic loading. In addition, the new Mechanistic Empirical Design Guide (MEPDG) software was used to compare the performance of pavement sections with ATB mixtures to existing pavement sections. The results of the laboratory testing program showed that the asphalt treated base mixtures have several folds improvement of UGM in terms of stiffness and permanent deformation resistance. In addition, the MEPDG analysis showed that pavement sections with ATB mixtures exhibited much lower rutting and fatigue cracking than the conventional pavement section. © 2010 ASCE.

Publication Source (Journal or Book title)

Geotechnical Special Publication

First Page

240

Last Page

247

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