Mechanical Properties of Warm Mix Asphalt Using Aspha-min®

The objective of this study is to evaluate the performance of Warm Mix Asphalt (WMA) made with Aspha-min® through laboratory testing and use the laboratory test results to evaluate the WMA pavement performance through the Mechanistic-Empirical Pavement Design Guide (MEPDG) analysis. Based upon the dynamic shear rheometer test, it was found that the additional Aspha-min® reduced the dynamic shear modulus compared with the control asphalt. There was no significant difference between the asphalt with additional Aspha-min® and the control asphalt in viscosity. In addition, the additional Aspha-min® has a significantly reduced bending beam creep stiffness based on statistical analysis. WMA showed a lower rutting depth, a higher indirect tensile resilient modulus at high temperature, and a higher dynamic modulus (E*) at certain cases. For the resilient modulus, there was no significant difference for the WMA compacted at 100°C and 120°C. For the dynamic modulus, WMA compacted at 120°C was significantly higher than WMA compacted at 100°C. Laboratory results were used in predicting the distress using MEPDG Software version 1.0 and the results were briefly discussed in this study.