Development and characterization of permeative anti-rutting agent for asphalt mixture enhancement

Abstract

Rutting distress has adverse effects on driving safety and comfort. However, how to enhance the rutting resistance of specific pavement sections contrapuntally and flexibly still requires further study. A permeative anti-rutting agent (PARA) based on epoxy resin and Buton rock asphalt was developed in this study to enhance the rutting resistance of asphalt pavement. It can improve the rutting resistance by permeating and curing in the asphalt pavement. Its optimum composition was characterized and determined at first. PARA’s effect on pavement performance of asphalt mixture was then tested and analyzed. Results suggested that the optimum mass proportion of epoxy resin, curing agent, curing accelerator and Buton rock asphalt was determined as 1.6:1:0.02:0.32. The lowest exudative percentage of PARA was found when its content was 0.9%. Higher PARA content will result in lower void volume and void in mineral aggregate of asphalt mixture. The mixture’s Marshall stability, moisture resistance, and dynamic stability were positively correlated to PARA’s content. The lowest flexural tensile strain and flexural tensile strength in low temperature occurred when PARA content was 0.9%. Asphalt mixture with 0.90% PARA showed optimum fatigue performance and aging resistance. Therefore, PARA can be used to enhance the asphalt pavement at low cost. Its advantage in flexibility and convenience results in its excellent application prospect.