掺加SiO_(2)的SBS改性沥青抗紫外老化提升技术  

Improvement Technology for UV Aging Resistance of SBS Modified Asphalt Mixed With SiO_(2)

作　　者：苟天波 刘自金 龙坤 毛成 Gou Tianbo;Liu Zijin;Long Kun;Mao Cheng(Sichuan Transportation Construction Group Co.,Ltd.,Chengdu 610041,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Highway Engineering Key Laboratory of Sichuan Province,Chengdu 610031,China;Sichuan Jiaotou Design Consulting Research Institute Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]四川省交通建设集团有限责任公司,四川成都610041 [2]西南交通大学土木工程学院,四川成都610031 [3]道路工程四川省重点实验室,四川成都610031 [4]四川交投设计咨询研究院有限责任公司,四川成都610041

出　　处：《市政技术》2024年第11期16-22,201,共8页Journal of Municipal Technology

基　　金：四川省交通运输科技项目(2024-ZL-08)。

摘　　要：为了提高沥青的抗紫外老化性能,使用成本较低的SiO_(2)作为抗紫外老化改性剂对SBS沥青进行改性。通过研究SBS改性沥青在紫外老化前后表面张力、流变性能和化学成分的变化,评估了SiO_(2)及其掺量对SBS改性沥青抗紫外老化性能的影响。研究结果表明:SiO_(2)与SBS改性沥青仅发生物理混合,掺加SiO_(2)能够提高SBS改性沥青的抗紫外老化性能,当其掺量为0.8%时,制备的SBS改性沥青具有优异的高温抗变形能力、抗疲劳性能、低温抗裂性能和抗水损害性能。In order to improve the anti UV aging performance of asphalt,low-cost SiO_(2)was used as an anti UV aging modifier to modify SBS asphalt.The influence of SiO_(2)and its dosage on the UV aging resistance of SBS modified asphalt was evaluated by studying the changes in surface tension,rheological properties and chemical composition before and after UV aging.The research results indicate that SiO_(2)and SBS modified asphalt only have physical mixing.The addition of SiO_(2)can improve the UV aging resistance of SBS modified asphalt.When the dosage is 0.8%,the prepared SBS modified asphalt has excellent high-temperature deformation resistance,fatigue resistance,low-temperature crack resistance,and water damage resistance.

关 键 词：SBS改性沥青 SiO_(2) 紫外老化 性能提升 

分 类 号：U414[交通运输工程—道路与铁道工程]