Meso-Scale Study on Shear Creep Behavior and Characteristic of Asphalt-Aggregate Interface

Abstract

To investigate the effects of asphalt–aggregate interface creep behavior, an interface creep constitutive model under the coupled compression and shear loading is established in term of the viscoelasticity theory. The model parameters were calibrated by the oblique interface shear creep tests with the nonlinear multiple variables fitting method. The results show there is a good agreement between the theory model curve and the experimental results, which reflect the three stages creep deformation characteristic of the asphalt–aggregate interface. The research gives some better insights into the meso-scale analysis of asphalt-aggregate interface viscoelastic behavior.