（1.陕西省交通建设集团公司，陕西 西安710065；2.西安ope电子竞技研究院，陕西 西安710065）
Effect of Rubber Powder Desulfurization on Technical Performance
of SBS Composite Rubber Asphalt
JIAO Xiao-long1,MA Qing-wei2,YANG Chen-guang2
(1. Shaanxi Transportation Construction Group Company, Xi’an 710065，China;
2. Xi’an Highway Research Institute, Xi’an 710065，China)
Abstract: Desulfurization can solve the problem that tire rubber powder is difficult to dissolve in asphalt, and greatly shorten the production cycle of modified asphalt, reduce the aging of asphalt, save production costs and reduce environmental pollution In this paper, the regenerated rubber powder for desulfurization was prepared by twin-screw extruder and desulfurizer The effects of screw extrusion temperature, petroleum resin content, desulfurizer and desulfurizer content on particle size and sol content of rubber asphalt were studied The technical properties of rubber asphalt under different factors were also studied The results showed that screw extrusion temperature and petroleum resin content were positively correlated with the sol content of desulfurized rubber powder; the sol content of desulfurized rubber powder extruded by screw was 41.4% higher than that of non-desulfurized rubber powder; compared with rubber asphalt without desulfurized rubber powder, the penetration of rubber asphalt B with desulfurized rubber powder increased by 100%, softening point and elastic recovery decreased by no more than 20%; Sulphur rubber powder B was used to prepare rubber asphalt.
key words: road engineering; SBS composite rubber asphalt; rubber powder desulfurization; technical performance; influence law