Modelagem constitutiva e caracterização empírica da interface revestimento asfáltico – base granular

Abstract

The relevance of asphalt coat-granular base interface is well established in the Pavement Mechanics literature. However, there is a predominance of an empirical approach of characterization of this phenomenon in Brazil. Such approach is incompatible with mechanistic design methods. In order to propose a rational approach to deal with the slippage phenomenon within the asphalt coat-granular base layer interface, this paper suggests a constitutive model and a mechanical test able to assess strength and stiffness parameters of this model, by using Mohr-Coulomb failure criteria and Goodman’s law, respectively. The experimental results support the model hypothesis and the test proved to be feasible to characterize other materials. Finally, structural analysis considering the model developed were performed through Finite Elements Method.