ABSTRACT
Cement stabilized macadam base can easily suffer from shrinkage cracks under large temperature variation and heavy vehicle traffic. In order to improve the cracking resistance, different test schemes were proposed through changing the amount of expansive agent and shrinkage reducing agent (SRA), and both mechanistic test and numerical simulation were carried out to obtain the optimum mixture design. Thermal stress significantly affects the shrinkage crack when temperature decrease suddenly. Using SRA and expansion agent (EA) together could improve shrinkage-reducing performance and decrease the risk of concrete crack which often occurred while only adding EA. The chapter focuses on improving the performance of cement stabilized macadam base, and analyzing the shrinkage stress and the temperature stress. It provides the different test schemes through changing the amount of expansive agent and shrinkage reducing agent, and examines both the dry shrinkage stress and the thermal stress of cement stabilized macadam base.
