TLA改性沥青及其混合料氯盐侵蚀作用下的性能  

Performance of TLA modified asphalt and mixture under chloride attack

作　　者：孟勇军[1,2] 韦耿平 李正华 覃悦 段跃华 邹海军 江微 MENG Yong-jun;WEI Geng-ping;LI Zheng-hua;QIN Yue;DUAN Yue-hua;ZOU Hai-jun;JIANG Wei(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Disaster Prevention and Reduction and Engineering Safety,Nanning 530004,China;Guangxi Expressway Investment Co.,Ltd.,Nanning 530022,China;Road&Bridge South Engineering Co.,Ltd.,Zhongshan 528403,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西防灾减灾与工程安全重点实验室,广西南宁530004 [3]广西高速公路投资有限公司,广西南宁530022 [4]中交路桥华南工程有限公司,广东中山528403

出　　处：《广西大学学报（自然科学版）》2020年第1期61-66,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51968006);广西自然科学基金资助项目(2014GXNSFBA118253)

摘　　要：为研究不同盐雾作用时间和不同盐雾浓度作用对TLA改性沥青老化性能的影响,采用盐雾试验箱模拟沿海地区的盐雾环境,通过对TLA改性沥青老化前后的针入度、软化点和延度的分析,对盐雾侵蚀后的基质沥青和TLA改性沥青混合料的高温稳定性进行探究。结果表明,TLA改性沥青比基质沥青更能抵抗氯盐盐雾侵蚀,具有更好的耐腐蚀性,盐浓度变化对沥青混合料动稳定度的影响比盐蚀作用时间对其影响更大,盐浓度的增加会比盐蚀作用时间的增加更能造成沥青混合料的高温稳定性的破坏,沥青混合料的动稳定度和变形量都与盐蚀浓度和盐蚀作用时间呈线性相关的关系。In order to reveal the effects of different salt spray time and different salt spray concentrations on the aging properties of TLA modified asphalt,this study uses salt spray test chamber to simulate the salt spray environment in coastal areas.Through analysis of the penetration,the softening point and ductility of TLA modified asphalt before and after aging test,the high temperature stabilition of matrix asphalt and TLA modified asphalt mixture after salt spray erosion were explored.The results show that the TLA modified asphalt is more resistant to chloride salt spray erosion than the matrix asphalt,and has better corrosion resistance.The influence of the salt concentration change of the asphalt mixture on the dynamic stability is greater than that of the salt erosion time.The increase of salt concentration has a greater effect on the increase of salt erosion time in destroying the temperature stability of asphalt mixtuxe.The dynamic stability and deformation of asphalt mixture are linearly related to salt erosion time and salt concentration.

关 键 词：TLA改性沥青 盐雾侵蚀 老化性能 高温稳定性 

分 类 号：U414[交通运输工程—道路与铁道工程]