高掺量SBS改性沥青及其混合料老化行为  

High content SBS modified asphalt and its mixtures aging behavior

作　　者：赵爱军 寇吟松 李武伦 王嘉昕 艾长发[4,5] 颜川奇 ZHAO Aijun;KOU Yinsong;LI Wulun;WANG Jiaxin;AI Changfa;YAN Chuanqi(China Railway City Development and Investment Group Co.,Ltd.,Chengdu 610218,China;Institute of Transportation Development Strategy&Planning of Sichuan Province,Chengdu 610041,China;China Railway Yibin Investment and Construction Co.,Ltd.,Yibin 644000,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Highway Engineering Key Laboratory of Sichuan Province,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]中铁城市发展投资集团有限公司,四川成都610218 [2]四川省交通运输发展战略和规划科学研究院,四川成都610041 [3]中铁宜宾投资建设有限公司,四川宜宾644000 [4]西南交通大学土木工程学院,四川成都610031 [5]西南交通大学道路工程四川省重点实验室,四川成都610031

出　　处：《广西大学学报（自然科学版）》2024年第4期751-763,共13页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(52008353)。

摘　　要：为了探究高掺量SBS改性沥青及其混合料的抗老化性能,分别对高掺量SBS改性沥青和70号基质沥青进行老化,并进行沥青流变性能试验,分别评价高掺量SBS改性沥青老化前后的弹性恢复性能、高温抗变形性能、抗疲劳性能,并对其混合料老化前后的高温稳定性、抗车辙性能和抗裂性能进行评价。研究结果表明:随着老化程度的加深,高掺量SBS改性沥青的模量增大,弹性恢复性能、高温抗变形能力、疲劳性能减弱,其混合料的高温稳定性与高温抗变形能力降低,抗裂性能逐渐变差;沥青氧化硬化和SBS氧化降解的博弈对高掺量SBS改性沥青及其混合料各性能均有不同程度的影响;尽管高掺量SBS改性沥青具有良好的抗老化性能,但仍需额外关注其老化所导致的性能下降问题。To investigate the aging resistance of highly concentrated SBS-modified asphalt and its mixtures,separate aging tests were conducted on the highly concentrated SBS-modified asphalt and base asphalt with a grade of 70#.Furthermore,asphalt rheological tests were performed to evaluate the elastic recovery,high-temperature deformation resistance,and fatigue performance of the highly concentrated SBS-modified asphalt before and after aging.Additionally,the high-temperature stability,resistance to rutting,and crack resistance of the asphalt mixtures were assessed before and after aging.Research results indicate that as the aging level deepens,the modulus of highly concentrated SBS-modified asphalt increases,while the elastic recovery performance,resistance to high-temperature deformation,and fatigue performance weaken.Moreover,the high-temperature stability and resistance to high-temperature deformation of the asphalt mixtures decrease,leading to a gradual deterioration in crack resistance.The interplay between asphalt oxidation hardening and SBS oxidation degradation exerts varying degrees of influence on the performance of highly concentrated SBS-modified asphalt and its mixtures.Despite highly concen trated SBS-modified asphalt has good aging resistance,it is crucial to pay extra attention to the performance decline resulting from aging.

关 键 词：道路工程 老化机制 改性沥青 沥青混合料 

分 类 号：U414[交通运输工程—道路与铁道工程]