With the rapid development of highway construction in China, a large number of highways have been built and used, which makes the task of road maintenance more and more important, especially the maintenance of high-grade highways. Slurry seal is an important preventive maintenance method of pavement, It is composed of emulsified asphalt, mineral aggregate (aggregate), filler (cement), water and additives, which are evenly mixed by special equipment (slurry seal truck) to make slurry mixture, which is evenly spread on the original asphalt pavement to form a maintenance layer firmly connected with the original pavement. This method of maintenance mainly used to improve the waterproof, anti-skid and wear resistance of pavement; Maintain slightly loose and oil-deficient pavement and prolong the service life of pavement; Slight crack repair and rut filling are carried out, and it has the characteristics of short open traffic time.
