ABSTRACT
The Cement Stabilized Material (CSM) has been accepted and utilized in multiple areas of China as semi-rigid base. To predict the fatigue damage of asphalt pavement with semi-rigid base and identify the effects of design parameters on fatigue life, simulating models are established by ABAQUS based on a nonlinear fatigue damage model and modulus attenuation law of CSM. The results show that the fatigue life of asphalt pavement with semi-rigid base increases exponentially as the thickness of structural layers increases. It is efficient to extend the service life of asphalt pavement by increasing the thickness of structural layers, especially that of semi-rigid base. The modulus of semi-rigid base and sub-base is not the higher the better, it should be determined rationally to meet the requirements of specification. It is concluded that the proposed numerical model can serve as an efficient tool to predict the fatigue life of asphalt pavements.
