TPS/SBS复合改性高黏沥青及混合料路用性能研究OA

To investigate the influence of TAFPACK-SUPER modifier(TPS)dosage on the performance of SBS-modified asphalt and its mixtures,this study systematically evaluated the high-and low-temperature stability of the composite modified asphalt through fundamental tests,including the three major indicators and dynamic viscosity test.Additionally,the high-temperature stability,water stability,and low-temperature crack resistance of the composite modified asphalt mixtures were validated using specific performance tests:rutting test for high-temperature stability,immersion flying loss test and freeze-thaw splitting strength test for water stability,and low-temperature bending test for low-temperature crack resistance.Experimental results reveal that TPS significantly enhances the high-temperature anti-shear capacity and low-temperature crack resistance of SBS-modified asphalt.A specific TPS dosage notably improves the high-temperature rutting resistance,water damage resistance,and low-temperature crack resistance of the composite modified asphalt mixtures.By comprehensively evaluating the performance of both the asphalt binder and the mixture,and aligning with specification technical requirements,a TPS dosage of 9％is recommended as optimal.