废旧轮胎橡胶粉/苯乙烯-丁二烯-苯乙烯嵌段共聚物/石油树脂复合改性沥青的制备及性能

以苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）、废旧轮胎橡胶粉和石油树脂制备复合改性沥青，并对复合改性沥青的储存稳定性、温度敏感性、高温流变性能、抗车辙性能和黏度等进行了考察。结果表明，复合改性沥青中，SBS、废旧轮胎橡胶粉及石油树脂的最佳质量分数分别为4.5%、14.0%和4.5%；石油树脂/SBS/废旧轮胎橡胶粉复合改性沥青具有较好的储存稳定性、温度敏感性和抗车辙性能。

Preparation and properties of waste tire rubber powder/styrene-butadiene-styrene block copolymer/petroleum resin composite modified asphalt

Composite modified asphalt was prepared with styrene-butadiene-styrene block copolymer (SBS), waste tire rubber powder and petroleum resin. And the storage stability, temperature sensitivity, high temperature rheological properties, rutting resistance and viscosity of the composite modified asphalts were investigated. The results showed that the optimum mass fractions of SBS, waste tire rubber powder and petroleum resin in the composite modified asphalt were 4.5%, 14.0% and 4.5%, respectively. Petroleum resin/SBS/waste tire rubber powder compound modified asphalt had better storage stability, temperature sensitivity and rutting resistance.