聚合物改性沥青对温拌再生沥青混合料路用性能影响

Influence of Polymer Modified Asphalt on Pavement Performance of Warm Mix Recycled Asphalt Mixture

通过单轴贯入试验、低温弯曲蠕变试验、冻融劈裂试验和四点弯曲疲劳试验分别对改性沥青温拌再生沥青混合料的高低温、水稳定性和抗疲劳性能进行室内试验分析,研究SBS改性沥青和SBR改性沥青分别对温拌再生沥青混合料的路用性能影响规律。试验结果表明,SBS改性沥青和SBR改性沥青都能够提高温拌再生沥青混合料的高温稳定性、低温抗裂性、抗水损害性和抗疲劳性能,但整体上SBS改性沥青的效果更显著,且SBS改性剂掺量推荐采用5%,SBR用量采用4%。

Uniaxial penetration test,low temperature bending creep test,freeze-thaw splitting test and four point bending fatigue test are used to analyze the high and low temperature,water stability and anti fatigue performance of modified asphalt warm mix recycled asphalt,and study the influence of SBS modified asphalt and SBR modified asphalt on the pavement performance of warm mix recycled asphalt.The test results show that both SBS modified asphalt and SBR modified asphalt can improve the high temperature stability,low temperature crack resistance,water damage resistance and fatigue resistance of warm mix recycled asphalt mixture,but on the whole,the effect of SBS modified asphalt is more significant,and the dosage of SBS modifier is recommended to be 5%,and the dosage of SBR is 4%.