Research Status and Trend of Cold Recycling Technology for Emulsified Asphalt

Haosheng Wang

SuJiaoKe Group Testing and Certification Co., Ltd., Nanjing, 211112, China 

Abstract: In recent years, with the rapid development of highway transportation, asphalt mixture pavement has developed rapidly in China. Due to the lack of natural sand, asphalt, stone and other resources, coupled with the enhancement of people's awareness of environmental protection, cold recycling technology of emul-sified asphalt has been widely used as a new road construction technology. Emulsified asphalt cold recycling technology has the advantages of gradation control, saving road materials, environmental protection, ecological balance, low cost and so on. Practice has proved that cold recycling technology of asphalt mixture can be used in the middle and lower layers ｏｒ base of high-grade highway, as well as the surface of middle and low traffic volume roads. This paper introduces the application status of asphalt pavement recycling technology in China, and points out that the research and popularization of cold plant mixing recycling technology is conducive to improving the recycling utilization rate of pavement materials in China. Based on the research status of cold recycled emulsified asphalt mixtures at home and abroad, the design and performance evaluation methods of cold recycled emulsified asphalt mixtures were summarized. The problems to be solved in improving the application level of emulsified asphalt plant mix cold recycling mixture in pavement structure are analyzed, and the future development and research direction of emulsified asphalt plant mix cold recycling technology are put forward.

Keywords: Cold recycling; Emulsified asphalt; Mixture design method; Rap content; Performance evaluation; Fatigue property