聚酯纤维掺量对环氧沥青桥面铺装混合料技术性能的影响

Study on Performance of Epoxy Asphalt and Its Mixture under Difrrent Polyester Fiber Content

为了提高环氧沥青混合料的低温抗裂性和抗疲劳性能,通过黏度、BBR、马歇尔、低温弯曲和三分点加载疲劳试验分析了1%~5%聚酯纤维掺量对环氧沥青及其混合料性能的改善作用。试验结果表明：掺聚酯纤维后,改性环氧沥青的容留时间缩短,且聚酯纤维掺量越大,改性环氧沥青黏度增长越快,容留时间越短;聚酯纤维的加入改善了环氧沥青及其混合料的低温抗裂性,且2%~3%纤维掺量条件下改性环氧沥青的抗疲劳性能最佳。综合考虑聚酯纤维改性环氧沥青混合料的路用性能和施工和易性,推荐最佳聚酯纤维掺量为2%~3%。

In order to improve the resistance of low temperature cracking and fatigue properties of epoxy asphalt mixture. various tests including viscosity,BBR,Marshall,cold bending and three-point loading fatigue test were carried out to analyze the improvement of 1% ~ 5% polyester fiber content on epoxy asphalt and its mixture. The results showed that： After mixed polyester fiber,the reserved time of modified epoxy asphalt shortened slightly,and the polyester fiber content greater the viscosity modified epoxy asphalt grow faster; The addition of polyester fiber improved the low temperature crack resistance of epoxy asphalt and its mixture. the Performance of Anti-fatigue Epoxy Asphalt Mixture achieve the best under the 2% ~ 3% polyester fiber content. Considering the polyester fiber modified epoxy asphalt pavement performance and workability,recommend the best polyester fiber content of 2% ~ 3%.