Theoretical Challenges of Cement Modified Crushed Rock Base Material In Pavements

Abstract

The use of Crushed Rock Base (CRB) course materials in Western Australia (WA) has had the challenge of moisture susceptibility. This causes the reduction of resilient modulus and consequently undesirable deformations in wearing course of pavements. As such, the drying back method along with two methods of cement modification in the form of low-cement CRB material and Hydrated Cement Treated Crushed Rock Base (HCTRB) have been tried and utilised in practice by stakeholders. Thus, the results of field experiences require to be reviewed in conformity with theoretical assumptions to provide better understandings for further improvements. Thus, based on laboratory test results, the reliability of the above methods is discussed in this paper after reviewing the background of each method.