胶粉/SBS复合改性高模量沥青混合料性能研究

胶粉/SBS复合改性综合了橡胶沥青和SBS改性沥青的优势，能显著改善混合料的高低温性能。采用残留稳定试验、冻融劈裂试验、低温弯曲试验、车辙试验、四点弯曲疲劳试验和动态模量试验，分析胶粉/SBS复合改性高模量沥青混合料的路用性能及动态力学特性，并与硬质20#高模量沥青混合料及SBS改性沥青混合料进行对比。结果表明，胶粉/SBS复合改性高模量沥青混合料的水稳定性、高低温性能、抗疲劳性能及动态模量值更优，且各项指标满足高模量沥青混合料要求。

Research on properties of high modulus crumb rubber / SBS composite modified asphalt mixture

The crumb rubber / SBS composite modified asphalt combines the advantages of rubber asphalt and SBS modified asphalt, which can significantly improve the high and low temperature performance of the asphalt mixture. The residential stability test, freeze-thaw splitting test, low temperature bending test, wheel rutting test, four-point bending fatigue test and dynamic modulus test are conducted to evaluate the pavement performance and dynamic mechanical properties.,And the hard-grade 20# high modulus asphalt mixture and SBS modified asphalt mixture are compared and analyzed. The results show that the water stability, high and low temperature performance, fatigue resistance and dynamic modulus of high modulus crumb rubber / SBS composite modified asphalt mixture are substantially better than those of hard-grade 20# high modulus asphalt mixture and SBS modified asphalt mixture, and all indicators meet the technical requirements of high modulus asphalt mixture.