Investigation on the pavement performance of asphalt mixture based on predicted dynamic modulus

• NCHRP 1-40D model yielded better E∗ values compared to NCHRP1-37A for base asphalt.
• Master curve of predicted E∗ can characterize the asphalt mixtures by CAM model.
• Witczak models were useful in estimating pavement performance.

The objective of this study is to evaluate the pavement performance through model analysis using predicted dynamic modulus (E∗). E∗ is predicted based upon the two global prediction models (NCHRP 1-37A and NCHRP 1-40D models). Christensen–Anderson–Marasteanu (CAM) model is utilized to fit master curve to the predicted E∗. Results indicate that the models are applicable to predict E∗ of asphalt mixture. Mastercurve of predicted E∗ can characterize the pavement performance by nonlinear fitting based on CAM model. Comparison of predicted results of pavement performance (rutting, cracking and fatigue) with measured results is made to verify the applicability of this approach. It is believed that the Witczak models are useful in estimating pavement performance associated with the CAM model, when actual E∗ tests or other performance tests are not possible or practicable in practice.