Low temperature performance of high modulus asphalt binder and mixtures: a review

High modulus asphalt mixture has become a favorable material for constructing long-life road with heavy traffic because of its outstanding rutting resistance and fatigue resistance. However, insufficient low temperature performance is the most important factor restricting its application and development. In recent years, how to improve the low temperature performance of high modulus asphalt and mixture has become a research focus in the field of pavement. This paper reviewed the four improving main technics of adding thermoplastic elastomers, oil-based modifiers, inorganic powder materials to the binder and fibers to the mixture. The relationship between the amount of modified material, modification process parameters and modification effect of these four improving technics was emphatically expounded, and the modification mechanism was summarized. Finally, the future research emphases and development trend of high modulus asphalt and mixture in low temperature performance were discussed, aiming to overcome the limitation of application scope of high modulus asphalt mixture and promote the application of high modulus asphalt mixture in long-life road with heavy traffic. © 2022 Chemical Industry Press. All rights reserved.