Abstract
In asphalt pavement, the surface course and the binding course is composed in two or three layer, and it is using the asphalt mixture which quality is different from in each layer. The finding out of the elastic modulus of each layer is important in the theory structure design of asphalt pavement. This paper presents a method of determining the elastic modulus of each layer by using a multi-layerd specimen with different pavement mixtures in bending test. In this method, elastic modulus of each layer is computed by backcalculation based on results of actual measurements and displacement or strain obtained through two dimensional elastic analysis by finite strip method. The results from a series of experiments on the elastic materials have demonstrated the validity of the present method. The other experiments have made it clear that the present method can beeffectively applied to determining the elastic modulus of each layer of asphalt mixtures in the low stiffness state.
