A predictive equation for dynamic modulus of asphalt mixtures used in Korea

The dynamic modulus of an asphalt mixture is widely used as an important material property in mechanistic–empirical (ME) pavement design and analysis because it accounts temperature and time-dependent asphalt mixture modulus. The aim of this study is to evaluate the dynamic modulus of asphalt mixtures used in Korea and develop a predictive equation for Korea ME pavement design guide based on the results of dynamic modulus tests. Asphalt mixtures contained a granite aggregate with PG 58-22 and PG 64-22 asphalt binders were tested at five different temperatures (−10, 5, 21, 40, and 55 °C) and six different loading frequencies (0.1, 0.5, 1, 5, 10, and 25 Hz). A predictive equation was constructed based on the test data, and compared and verified between the measured and the predicted dynamic modulus. From the results, it was found that the predictive equation correlated well with the measured values.