光稳定剂对高海拔地区用温拌沥青抗光老化性能提升研究  

Improvement of photostabilizer on light-ageing resistance of warm mix asphalt for using in high altitude areas

作　　者：陈敬英 袁飞云 黄维蓉 姜涛 任海生 CHEN Jingying;YUAN Feiyun;HUANG Weirong;JIANG Tao;REN Haisheng(Sichuan Lushi Expressway Co.,Ltd.,Chengdu 610047,China;Sichuan Zangqu Expressway Co.,Ltd.,Chengdu 610047,China;School of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Sichuan Dashan Expressway Co.,Ltd.,Chengdu 610047,China;ITS Research Center,Southeast University,Nanjing 211189,China)

机构地区：[1]四川泸石高速公路有限责任公司,四川成都610047 [2]四川藏区高速公路有限责任公司,四川成都610047 [3]重庆交通大学材料科学与工程学院,重庆400074 [4]四川达陕高速公路有限责任公司,四川成都610047 [5]东南大学智能运输系统研究中心,江苏南京211189

出　　处：《应用化工》2024年第10期2484-2490,共7页Applied Chemical Industry

基　　金：四川交通科技项目(E1210366);重庆市研究生联合培养基地建设项目(JDLHPYJD2018006)。

摘　　要：为评估光稳定剂对高海拔强紫外线地区用温拌沥青的抗光老化性能提升效果,选用Tinuvin770、UV-326以及纳米二氧化钛(TiO_(2))三种光稳定剂制备改性温拌抗光老化沥青,并对其进行三大指标、布氏黏度、低温弯曲蠕变以及时间扫描抗疲劳实验。结果表明,3种光稳定剂对温拌沥青的抗光老化性能均有较好的提升效果,TiO_(2)的改善效果最优;紫外线老化后,温拌沥青的黏度老化指数VAI、临界开裂温度T_(c)与光稳定剂的掺量呈反比,改性温拌抗光老化沥青的疲劳寿命最高达到2300次。推荐光稳定剂T770、UV326和纳米TiO_(2)的掺量分别为0.7%,0.7%和3%。To assess the effect of photostabilizers on the anti-light aging performance of warm mix asphalt for high altitude and strong ultraviolet regions,three kinds of photostabilizers(Tinuvin770,UV-326,TiO_(2))were selected to prepare warm mix and anti-light aging modified asphalt binders,and they were subjected to three fundament indexes test,Brookfield viscosity test,low-temperature bending creep test,and time-sweep fatigue test.The results show that three kinds of photostabilizers exhibited a excellent improvement on the anti-light aging performance of warm mix asphalt,TiO_(2) has the best improvement performance.After ultraviolet aging,the viscosity aging index VAI and critical cracking temperature T_(c) of warm mix asphalt were inversely proportional to the dosage of photostabilizer,and the fatigue life of modified asphalt reached up to 2300 times.The recommended dosages of photostabilizers T770,UV326 and nano TiO_(2) are 0.7%,0.7%and 3%,respectively.

关 键 词：高海拔地区 强紫外线 温拌沥青 光稳定剂 抗光老化性能 

分 类 号：TQ027.6[化学工程]