Mechanical Properties of Cement Stabilized Macadam Mixed with Emulsified Asphalt

Abstract

At present, the performance evaluation of cement stabilized macadam mixed with emulsified asphalt is mainly based on strength and shrinkage deformation, however, lack of consideration of its fatigue performance, resulting in a relatively less application in practical engineering. This paper aims at evaluating comprehensively the material properties of cement stabilized macadam mixed with emulsified asphalt based on its mechanical strength and fatigue performance. The conventional mechanical strength, compressive resilient modulus and fatigue life were tested by MTS test machine, and the flexural tensile resistance performance of the mixture was analyzed based on the strain work required by flexural tensile failure, finally combining the flexural tensile strength and fatigue test results, a compressive strength modification method was proposed for the reference of engineering acceptance. The test results show that the strength indicators of the mixture with 1.2% pure asphalt content decrease, but its flexural tensile resistance performance improves: the unconfined compressive strength and splitting strength decrease by 20%, the flexural tensile strength decreases by 4%, the compressive resilient modulus decreases by 13%, but the flexural tensile strain work increases by 18.7%. At the same time, the long-term performance of the mixture improves: the fatigue life increases by 31%.