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基于流变性评价沥青自愈合性能研究
作者：陈宇1，2，韦万峰2，3，4，周胜波2，3，4，禤炜安2，3，4，王彬2，3，4
（1.广西北部湾投资集团有限公司，广西 南宁 530007；2.广西道路结构与材料重点实验室，广西 南宁 530007；
3.高等级公路建设与养护技术、材料及装备交通运输行业研发中心，广西 南宁 530007；
4.广西交通科学研究院有限公司，广西 南宁 530007）
摘要：为了分析基于流变性得到的评价指标（HI1、HI2、HI3、HI4、HI5）对沥青自愈合性能评价的合理性，采用DSR测试基质沥青、SBS改性沥青、橡胶改性沥青的复数模量随加载次数的关系；基于四点弯曲疲劳试验，研究了基质沥青混合料、SBS改性沥青混合料、橡胶改性沥青混合料的疲劳-自愈合性能。结果表明：采用不同的指标评价沥青的自愈合性能往往会得到不同的结果，即基质沥青、SBS改性沥青、橡胶改性沥青的自愈合性能高低排序不一致，其中HI5指标对3种沥青自愈合性能的评价结果与混合料一致，橡胶改性沥青、SBS改性沥青的自愈合性能明显优于基质沥青。
关键词：沥青；改性沥青；流变性；自愈合；混合料
中图分类号：TU535 文献标识码：A 文章编号：1001-702X（2020）02-0027-05
Study on self-healing performance of asphalt based on rheological properties
CHEN Yu1，2，WEI Wanfeng2，3，4，ZHOU Shengbo2，3，4，XUAN Weian2，3，4，WANG Bin2，3，4
（1.Guangxi BeiBu Gulf Investment Group Co. Ltd.，Nanning 530007，China；
2.Guangxi Key Lab of Road Structure and Materials，Nanning 530007，China；
3.Research and Development Center on Technologies，Materials and Equipment of High Grade Highway Construction and Maintenance Ministry of Transport，Nanning 530007，China；
2.Guangxi Key Lab of Road Structure and Materials，Nanning 530007，China；
3.Research and Development Center on Technologies，Materials and Equipment of High Grade Highway Construction and Maintenance Ministry of Transport，Nanning 530007，China；
4.Guangxi Transportation Research & Consulting Co. Ltd.，Nanning 530007，China）
Abstract：In order to analyze the rationality of evaluation indexes HI1，HI2，HI3，HI4 and HI5 based on rheological properties for self-healing performance of asphalt，DSR（dynamic shear rheometer） is used to test the relationship between the complex modulus and loading times of virgin asphalt，SBS modified asphalt and rubber modified asphalt. Based on four-point bending fatigue test，the fatigue-self-healing properties of virgin asphalt mixture，SBS modified asphalt mixture and rubber modified asphalt mixture are studied. The results demonstrate that evaluate the self-healing performance of asphalt with different indicators may obtain different results，the order of self-healing ability of virgin asphalt，SBS modified asphalt and rubber modified asphalt is inconsistent，and the evaluation result of HI5 index on self-healing ability of three asphalts is consistent with mixtures，the self-healing ability of rubber modified asphalt and SBS modified asphalt is better than virgin asphalt obviously.
Key words：asphalt，modified asphalt，rheology，self-healing，mixture