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SBS类改性沥青低温性能评价及指标相关性分析
Evaluation of Low Temperature Performance and Correlation Analysis on Low Temperature Indexes of SBS Modified Asphalts
投稿时间:2016-06-07  修订日期:2016-07-11
DOI:10.3969/j.issn.1007 9629.2017.03.023
中文关键词:  道路工程  低温性能  相关性分析  延度  PG分级
英文关键词:road engineering  low temperature performance  correlation analysis  ductility  PG rating
基金项目:国家自然科学基金资助项目(51478351)
           
作者单位
黄卫东
HUANG Weidong
同济大学道路与交通工程教育部重点实验室,上海201804
Key Laboratory of Road & Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China
傅星恺
FU Xingkai
同济大学道路与交通工程教育部重点实验室,上海201804
Key Laboratory of Road & Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China
李彦伟
LI Yanwei
石家庄交通运输局,河北石家庄050001
Shijiazhuang Bureau of Traffic and Transportation, Shijiazhuang 050001, China
刘少鹏
LIU Shaopeng
交通运输部规划研究院,北京100028
Department of Transportation Planning and Research Institute, Beijing 100028, China
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中文摘要:
      通过25℃针入度试验、5℃延度试验和小梁弯曲蠕变试验(BBR),对15种沥青进行低温性能评价和排序,并通过输出Person相关系数和线性拟合,对25℃针入度、5℃延度与PG低温分级温度进行相关性分析.结果表明:SBS类改性沥青的低温性能较基质沥青有不同程度的提升,其中TB+SBS类复合改性沥青以及高掺量橡胶粉沥青的低温性能最为优异;5℃延度同PG低温分级温度的相关性很低,说明用5℃延度来评价SBS类改性沥青低温性能存在局限性;25℃针入度与PG低温分级温度的相关性比5℃延度与PG低温分级温度的相关性高,25℃针入度与改性沥青低温性能的相关性有待进一步研究.
英文摘要:
      Low temperature performance and correlation between PG index and 25℃ penetration, as well as PG index and 5℃ ductility of SBS modified asphalts was evaluated by outputting Person coefficients and linear fitting. The results show that low temperature performance of SBS modified asphalts is improved compared with matrix asphalts, TB+SBS modified asphalts and rubber powder modified asphalts with high proportion of rubber powder could reach the best low temperature performance. 5℃ ductility has a very low correlation degree with PG index, which is limited to evaluate the low temperature performance of most SBS modified asphalts. Correlation of 25℃ penetration and PG index is higher than correlation of 5℃ ductility and PG index, but it needs further study.
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