ABSTRACT
An evaluation of the predictive capabilities of the Bari-Witczak and the Onifade-Birgisson models for the prediction of dynamic shear modulus and phase angle from conventional steady-state viscosity is performed. The study considers five different geographical locations with a wide range of temperature in order to account for the range of in-service pavement temperature conditions in the US. The Bari-Witczak models predicted accurate tendencies of dynamic shear modulus and phase angle for pavement sections in the warmer regions, while several irregularities in model predictions were observed for the pavement sections in the colder region. On the other hand, the Onifade-Birgisson model is sensitive to the variations in the pavement temperature with realistic tendencies predicted for the different pavement locations and seasons. The results of the model predictions can have serious implications for the reliable estimation of mixtures dynamic modulus, evaluation of susceptibility of binders to low-temperature cracking, and the evaluation of pavement long-term performance.
