This invention relates to the field of pavement
asphalt materials technology, specifically to a rubber
asphalt mixture and its preparation method. The rubber
asphalt mixture is composed of the following raw materials in parts by weight: 130-150 parts aggregate, 20-30 parts
petroleum asphalt, 10-15 parts limestone, 8-15 parts waste tire rubber
powder, 1-1.5 parts SBS, 0.6-1.2 parts p-aminobenzamide, 1.5-2.5 parts
silane coupling agent, 5-8 parts
polyethylene wax, 0.5-1 part
sodium lauryl ether sulfate, 2-3 parts
carbon black, 0.2-0.5 parts 3-cyclohexylthiophene, and 3-5 parts functional additives. The rubber asphalt mixture prepared by this invention not only possesses excellent mechanical properties but also exhibits good resistance to
ultraviolet aging, effectively ensuring the quality of the rubber asphalt mixture while also extending its service life to a certain extent.