ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 7

Prediction of Permanent Deformation of Asphalt Concrete in Cyclic and Monotonic Loading

Ramsamooj, DV
Professor of Civil Engineeringresearch associate, California State University, Fullerton (CSUF)University of Southern California, Fullerton, CA

Ramadan, J
Professor of Civil Engineeringresearch associate, California State University, Fullerton (CSUF)University of Southern California, Fullerton, CA

(Received 14 January 1998; accepted 8 June 1999)

Abstract

New theoretical developments are presented to predict the permanent deformation in asphalt concrete caused by constant-load creep and by cyclic loads. The constitutive model utilizes multi-yield surfaces and isotropic hardening. A new hardening law for the changes in the values of the plastic moduli during monotonic or cyclic loading is derived from Rowe's stress-dilatancy theory. A complete description of the permanent deformation of asphalt concrete under constant load creep and cyclic loading is given, including the elastic, viscoelastic, plastic, and microcracking components, to predict the permanent deformation under cyclic loading. The model parameters have clearly defined physical meanings and can be determined from simple conventional laboratory tests. A computer program called RUT determines the permanent deformation. There is good agreement between the model predictions and the experimental data.

Keywords:
stress-dilatancy, rutting, cracking, asphalt concrete, compression

Paper ID: JTE12232J
DOI: 10.1520/JTE12232J
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