Resilient modulus and influencing parameters of unbound crushed limestone

Abstract

The design method of pavement structure is evolving to the new Mechanistic-Empirical (M-E) approach. The M-E approach has many significant benefits over the empirical design approach. One major success is it can identify the distress patterns and the progress rate at a given pavement structure. This is possible by the knowledge of mechanistic behavior of pavement materials responding to the repeated loads. In order to obtain mechanistic properties of the road base materials for the M-E approach, a set of laboratory experiment needed to be conducted on the materials. In this research, an unbound crushed limestone is prepared for carrying out cyclic testing methods using the triaxial load frame: as Determination of Resilient Modulus using AASHTO T 307 procedure; The results of these tests provide the resilient modulus characteristic of unbound granular based materials for using in the Mechanistic-Empirical Pavement Design.