Estimation the Design Paramters of Surface Course Asphalt Concrete by Cyclic and Static Loading

This study aimed to evaluate the permanent deformation of asphalt mixtures employing two testing methods: the cyclic and static loading tests. In the cyclic loading test, the creep rate was determined using a locally manufactured SHRL machine, according to the BS EN 12647-25-2016 standard specification. While in the static loading test, the strength against deformation (SD) was investigated utilizing the Kim testing procedure was adopted. Four wearing course asphalt mixture were prepared using two types of aggregates (Thumail and Al-Nibaie) and two types of asphalt binders (Erbil and Al-Dora). Results from both tests demonstrated that the resistance to permanent deformation varies based on the type of asphalt and aggregate used in the mixture. Mixtures prepared by Thumail aggregates showed higher resistance to deformation than that prepared using Al-Nibaie aggregate. There was a good agreement between the results from both tests. From the result, it is proposed a new design equation that can be used in design the surface layer depend on the test type.