文章摘要
热老化后SBS改性沥青的微观结构及自愈合性能
Microstructure and Self-Healing Performance Experiment of SBS-Modified Asphalt After Heating Aging
  
DOI:10.16865/j.cnki.1000-7555.2018.05.011
中文关键词: SBS改性沥青  自愈  微观结构  正交实验
英文关键词: SBS-modified asphalt  self-healing  microstructure  orthogonal experiment
基金项目: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
作者单位
崔亚楠1,2, 陈 超2,3, 赵 琳2 1. 道路结构与材料交通行业重点实验室北京 100088
2. 内蒙古工业大学 土木工程学院内蒙古 呼和浩特 010051
3. 南水北调东线山东干线有限责任公司山东 济南 250014 
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中文摘要:
      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。
英文摘要:
      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.
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