EXPERIMENTAL STUDY ON PERMANENT DEFORMATION OF BASE COURSE SURFACE IN CONCRETE PAVEMENT

Abstract

In this study, the permanent deformation at base course surface was examined using the Westergaard's model based on the results of the static and the cyclic loading tests with a concrete pavement at the Public Works Research Institute in August 1997. The analytical results of the static loading test showed that, for presice calculation of the deflection or pressure, the base course reaction modulus should be modified based on the Boussinesq's model as Vesic had suggested. And in the cyclic loading test, the development of a permanent deformation of base course surface with cyclic loads was observed, and the decreasing of reaction modulus due to the permanent deformation was confirmed.