A Laboratory Study on Rutting Resistance Performance of High Modulus Asphalt Mixture

In order to improve the rutting resistance of expressway asphalt pavement, a hard asphalt additive compound, EME-14, was used to prepare the high modulus asphalt mixture. Using the rutting test and dynamic modulus test at different temperatures, the high and low temperature properties of the EME-14 and common high modulus asphalt mixtures EME-14, SUP-20, and SBS modified AC-20 asphalt mixtures were compared and analyzed. Predictive analysis was carried out by using the dynamic modulus main curves. The results showed that the dynamic stability of high modulus asphalt mixture EME-14 prepared by hard pitch additive compound was 11,059 times/mm, which was about 1.4 times of EME-14 dynamic stability of common high modulus asphalt mixture, 1.6 times of SUP-20 dynamic stability, and 1.8 times of modified AC-20. Compared with traditional middle-layer asphalt mixture, it has excellent rutting resistance performance at high temperatures.