基于MMLS3的纳米复合改性沥青混合料高温稳定性研究  

High Temperature Stability of Nano-particles/polymer Modified Asphalt Mixture Based on MMLS3

作　　者：苏曼曼[1] 高阳[1] SU Man-man GAO Yang(Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang＇an University, Xi＇an 710064, China)

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安市710064

出　　处：《公路》2017年第8期221-227,共7页Highway

基　　金：浙江省交通运输厅科技计划项目;项目编号2014H25

摘　　要：为评价纳米/聚合物复合改性沥青混合料的高温性能,制备了基质沥青混合料试件、4%SBS改性沥青混合料试件、3%ZnO+0.5%TiO_2改性沥青混合料试件、3.7%SBS+3%ZnO+0.5%TiO_2改性沥青混合料试件。采用小型加速加载设备(MMLS3)对上述沥青混合料试件进行高温稳定性试验。同时测定不同混合料的动稳定度。试验结果表明,两种试验得出的不同沥青混合料高温稳定性能优劣顺序是一致的,即:SBS/ZnO/TiO_2沥青混合料、SBS沥青混合料、ZnO/TiO_2沥青混合料、基质沥青。可见,当纳米材料与聚合物复掺时,沥青混合料的高温性能优于单掺纳米材料或者单掺聚合物材料。因此,对高温稳定性有较高要求的地区,可以采用纳米/聚合物复掺的改性方法对沥青的高温性能进行改善。In order to evaluate the high temperature stability of nano-particles/polymer modified asphalt mixture, the specimens of base asphalt mixture, 4% SBS modified asphalt mixture, 3% ZnO＋ 0.5% TiO2 modified asphalt mixture and 3.7% SBS＋3% ZnO＋0.5% TiO2 modified asphalt mixture are prepared. The accelerated pavement tests of these specimens are conducted with 1/3 model mobile load simulator. At the same time, the dynamic stability of different asphalt mixture is measured. Both of the two different tests results indicate that the improvement order of high temperature stability property is 3.7% SBS＋3% ZnO＋0.5% TiO2 modified asphalt mixture, 4% SBS modified asphalt mixture, 3% ZnO ＋0.5% TiO2 modified asphalt mixture, and base asphalt mixture. Hence when the polymer and nano- particles are simultaneously used to modify asphalt, the improvement high temperature stability of base asphalt is better than when the nano-particles or polymer is independently used to modify asphalt. Therefore, for the area which has high demand level for high temperature stability of asphalt, the method of nano--particels/polymer modification to improve the property of asphalt is feasible.

关 键 词：道路工程 1/3行车荷载模拟系统 加速加载试验 纳米/聚合物改性沥青混合料 高温稳定性 

分 类 号：U414.01[交通运输工程—道路与铁道工程]