VISCOELASTIC MASTER CURVE SIMULATION AND CONVERSION OF ASPHALT MIXTURES

Master curves of dynamic modulus and creep compliance of asphalt mixtures at different temperatures are developed on the basis of time-temperature superposition principle. Generalized Maxwell and Kelvin models are performed to simulate relaxation and creep behavior, respectively. The viscoelastic master curves are converted reciprocally by using Prony series and Laplace transformation principle, and the converted master curves are compared with test results. The results show that the generalized Maxwell and Kelvin models can be employed to simulate viscoelastic master curves of asphalt mixtures; the viscoelastic master curves for creep and relaxation can be converted reciprocally; the master curves of storage modulus and creep compliance obtained from conversion are consistent with the test results; the authentic master curves of relaxation modulus should be between the results converted from storage modulus and creep compliance. The results provide a useful reference for the study on the viscoelastic mechanics and viscoelastic parameters of asphalt mixtures.