高海拔地区用温拌抗光老化沥青低温性能研究  

Study on the low-temperature performance of warm-mix anti-light aging asphalt for high altitude areas

作　　者：郭锃炜 张志强 黄维蓉 熊柯霖 武亮 任海生 Guo Zengwei;Zhang Zhiqiang;Huang Weirong;Xiong Kelin;Wu Liang;Ren Haisheng(CCCC No.6 Engineering Co.,Ltd.,Tianjin 300308;School of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074;ITS Research Center,Southeast University,Nanjing 211189)

机构地区：[1]中交一公局第六工程有限公司,天津300308 [2]重庆交通大学材料科学与工程学院,重庆400074 [3]东南大学智能运输系统研究中心,南京211189

出　　处：《化工新型材料》2024年第S01期371-377,383,共8页New Chemical Materials

基　　金：中交集团交通科技项目(E1200321);重庆市研究生联合培养基地建设项目(JDLHPYJD2018006)。

摘　　要：针对高海拔地区沥青路面易诱发紫外老化、低温开裂问题,采用3种光稳定剂制备出改性温拌抗光老化沥青,通过低温延度、差示扫描量热分析和弯曲蠕变劲度试验以及Burgers黏弹模型,对光老化前后的沥青开展多指标低温性能评价,并借助灰色关联度法分析各低温指标的相关性。结果表明:表面活性温拌剂对沥青的低温性能有不利影响;3种光稳定剂均对沥青抗光老化性能有改善作用,其中UV326能明显改善温拌沥青低温性能,抗光老化效果最佳,Burgers模型能准确描述沥青在弯曲蠕变劲度试验中的低温蠕变行为。根据灰色关联分析结果,推荐蠕变速率、-18℃低温综合柔量参数和玻璃态转变温度可作为高海拔地区沥青胶结料的选型指标。For asphalt pavement in high-altitude areas is easy to induce ultraviolet aging,low-temperature cracking distresses,three photostabilizers were selected to prepare modified warm-mix anti-light aging asphalt binders.Through the low-temperature ductility,differential scanning calorimetry analysis,bending creep strength test and Burgers viscoelastic model,the low-temperature performance of the asphalt binders before and after light aging was evaluated by using multiple indicators method.The correlation of various low-temperature indicators was analyzed by grey correlation method.The results showed that the surface-active warm-mix agent had a negative effect on the low-temperature performance of asphalt.All three kinds of photostabilizers had improvement effects on the anti-light aging performance of asphalts,among which UV326 could significantly improve the low-temperature performance of warm-mix asphalt,exhibiting the best anti-light aging effect.The Burgers model could accurately describe the low-temperature creep behaviour of asphalts in the bending creep strength test.According to the results of grey correlation analysis,the recommended creep rate,-18℃low-temperature integrated flexibility parameters and glass transition temperature could be used as the selection index of asphalt binders in high altitude areas.

关 键 词：高海拔地区 温拌沥青 抗光老化 低温性能 灰色关联 

分 类 号：U414[交通运输工程—道路与铁道工程]