To improve the durability of asphalt pavement,composite modifier C with balanced performance is selected from four types of composite modifiers A(polyethylene composite material),B(polymer composite material),C(rubber-plastic alloy material),and D(polymer composite material)to prepare modified asphalt mixtures compliant by mixing it with high-performance graded asphalt mixture SUP-20.Styrene-butadiene triblock copolymer(SBS)modified asphalt mixture SUP-20 is used as the control sample for conducting high-temperature anti-rutting performance tests,anti-water damage performance tests,low-temperature performance tests,etc.The test results show that the average dynamic stability,the splitting strength ratio,the flexural tensile strength,and the resistance to low-temperature damage of the C-70# matrix asphalt SUP-20 mixture after composite modification increases by 11.0％,1.7％,8.6％,and 14.9％,respectively.The dynamic modulus at temperatures of 5,20,35 ℃ and frequencies of 0.1,1,10 Hz are all greater than that of the SBS-modified asphalt mixture SUP-20,with phase angles less than that of the SBS-modified asphalt mixture SUP-20.
关键词
复合改性/路用性能/耐久性/高温稳定性/低温性能/抗水损坏性能
Key words
composite modification/pavement performance/durability/high temperature stability/low temperature performance/water resistance performance
维普
万方数据