Towards improved characterization of cemented pavement materials

Abstract

Increasing use of high productivity road freight vehicles combined with more sophisticated approaches to pavement analysis has led to the need for improved knowledge of the performance of pavement materials. This paper describes the development of laboratory tests intended for routine assessment of strength, modulus and fatigue properties of cemented pavement materials. The laboratory tests involved a four-point bending flexural beam test. Methods for preparation of beam specimens in the laboratory and from field-placed cemented material are described. In order to provide materials performance data needed to verify the improved laboratory tests, the Australian Accelerated Loading Facility (ALF) was used to assess the fatigue performance of two cemented materials. A comparison of laboratory characterization results and full-scale ALF trial results was favorable providing confidence in the use of the laboratory techniques. Two cases involving implementation of the laboratory strength and modulus tests with practical outcomes are presented.