摘要
采用动态剪切流变仪(DSR)和原子力显微镜(AFM),分别对原样沥青、经旋转薄膜烘箱(RTFO)老化后和压力老化(PAV)后的SBS改性沥青进行测试,分析SBS改性沥青在不同老化程度、损伤程度、自愈时间和自愈温度等因素的影响下,其自愈合性能的变化规律。通过四因素三水平的正交实验,得到影响SBS沥青自愈合能力的最大因素;利用原子力显微镜观测不同老化程度下SBS改性沥青的微观结构。结果表明,影响沥青自愈合性能的最大因素是老化程度,其后依次是损伤程度、愈合温度和愈合时间;综合原子力显微镜的观测结果,沥青经老化作用后表面越粗糙,其自愈性也就越差。
Through atomic force microscope（ AFM） and dynamic shear rheometer（ DSR）,the original and the aged asphalt samples through RTFO and PAV were tested. The changes of self-healing performance of SBS modified asphalt were analyzed under the influence of different aging degree,damage degree,self-healing time and self healing temperature. Though the orthogonal experiment of 4 factors and 3 levels,the biggest factor affecting self-healing performance of SBS modified asphalt was found; and the microstructure of SBS-modified asphalt under different aging condition was observed by AFM. The results show that the biggest factor affecting the self-healing performance of SBS-modified asphalt is aging degree,followed by damage degree,self-healing temperature and self-healing time; the rougher the surface of SBS-modified asphalt after aging according to AFM is,the worse self-healing performance is.
作者
崔亚楠
陈超
赵琳
Yanan Cui;Cao Chen;Lin Zhao(Key Laboratory of Road Structure and Materials Transportation, Beijing 100088, China;School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;East Route of the South-to-North Water Diversion Project of Shandong Co. , Ltd, Jinan 250014, China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2018年第5期65-70,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51568054)
道路结构与材料交通行业重点实验室(北京)开放基金
关键词
SBS改性沥青
自愈
微观结构
正交实验
SBS-modified asphalt
self-healing
microstructure
orthogonal experiment
