Simultaneous determination of cement stabilized macadam’s dynamic resilient modulus in compression and tension by bending beam test

Abstract

Accurately determining the modulus of cement stabilized macadam is a crucial and essential task for effectively calculating the mechanical response or evaluating the performance of semi-rigid asphalt pavement. However, there is currently still no standardized or widely acknowledged method for determining the modulus of cement stabilized macadam, which makes pavement response calculation and performance evaluation more challenging. Therefore, this study first outlines the features of several typical approaches that have been utilized to date to determine the modulus of cement-stabilized macadam while also highlighting the drawbacks of these approaches. Then, based on these analyses and summaries, proposes a new method that uses bending beam test to simultaneously determine the dynamic resilient modulus in compression and tension for cement stabilized macadam. Afterwards, in order to verify the proposed method, this study conducts three different types of dynamic resilient modulus tests for cement stabilized macadam, and compares the test results of these three types of methods to figure out the differences in their mechanical mechanisms. Finally, based on these tests and analysis, some reasonable recommendations about dynamic resilient modulus testing of cement stabilized macadam are provided.

Keywords

• Asphalt pavement
• Semi-rigid base course
• Cement stabilized macadam
• Dynamic resilient modulus
• Bending beam method
• Direct compression method