Temperature-dependent viscoelastic model for asphalt concrete using discrete rheological representation

The modified viscoelastic model is proposed for asphalt concrete according to a new viscoelastic model, which has four materials parameters. By Fourier transform, the model is able to provide a frequency independent response over a wide range of frequencies. The rheological representation of model is provided by an internal variable description and is processed using the discrete element method. Furthermore, the model has been appropriately enhanced in order that the important temperature effects are taken into account. Asphalt being a thermos-rheologically simple material, the temperature dependence is modeled by the time-temperature superposition principle. The model is applied for the description and prediction of asphalt behavior. The response of the different asphalt materials for frequency sweep test is captured and the model predicts the loss tangent and complex shear modulus for asphalt concrete very well.