Test method and influencing factors for the dynamic compression elastic modulus of asphalt mixtures

In order to study the effects of strain test methods,loading frequency,testing temperature and stress amplitude on the dynamic compression elastic moduli of asphalt mixtures,the dynamic compression elastic moduli of two kinds of commonly asphalt mixtures,AC-16 and AC-20,were studied by using an MTS dynamic pavement material test system.The relation between the above factors and the dynamic compression elastic modulus as well as the relation between the static and dynamic compression elastic modulus was established.According to the analysis of test results,the data tested by the side method much approach to the recommended values in the specification and the side method can also eliminate the contact error of the specimen caused by the top surface method.It is recommended that the side method is firstly chosen to use in the static and dynamic modulus test.While an appropriate load frequency is selected in the dynamic test,the deviation coefficient of test results should be controlled below 20%.