High-temperature-resistant double-SBS composite modified asphalt and preparation process thereof

The invention discloses high-temperature-resistant double-SBS composite modified asphalt and a preparation process thereof. The double-SBS composite modified asphalt is composed of matrix asphalt, a stabilizer and two SBS modifiers. Due to the differences in the properties of different SBS, the modification effect of single-type SBS is quite different. The compound modification of the two kinds ofSBS on the matrix asphalt can better exert the advantages of different types of SBS, and meanwhile, the cost is reduced to some extent. The-double SBS composite modified asphalt prepared by the invention has good high temperature resistance, ductility and anti-aging property, and has broad application prospects in a city with long-term high-temperature climate. 本发明公开了种耐高温的双SBS复合改性沥青及其制备工艺，双SBS复合改性沥青由基质沥青，稳定剂，两种SBS改性剂组成。由于不同的SBS自身性质存在差异，单种类SBS的改性效果差别较大，将两种SBS对基质沥青进行复合改性后可以更好发挥不同种类SBS的优点，同时在定程度上降低成本。本发明制备得的双SBS复合改性沥青具有良好的耐高温性、延展性和抗老化性能，在处于长期高温气候的城市具有广阔的应用前景。