沥青结合料低温抗裂性指标试验研究  

Experimental Study on Index of Low-temperature Crack Resistance of Asphalt Binder

作　　者：李晓娟[1] 韩森[1] 李渊 李波[3] 

机构地区：[1]长安大学公路学院,西安710064 [2]中交二公局三公司,西安710016 [3]兰州交通大学土木工程学院,兰州730070

出　　处：《武汉理工大学学报》2010年第7期81-84,共4页Journal of Wuhan University of Technology

基　　金：国家西部交通建设科技项目(200731822301-8)

摘　　要：沥青混合料低于10℃时,其性质主要取决于沥青的性质,所以沥青的选择和评价依据非常重要。将SHRP研究成果与传统规范相结合,分别对KLM70#、KLM90#、KLM110#沥青和SBS改性沥青进行弯曲蠕变试验、针入度及延度试验,对比分析了这4种沥青的低温性能。结果表明:SBS改性沥青的低温性能最好;KLM沥青标号值越大,低温性能越好;RTFOT后10℃延度指标可较合理区分未改性沥青低温抗裂性差异;用T1.2、5℃延度、15℃针入度来评价沥青结合料的低温抗裂性可行。The nature of asphalt mixture in a temperature below 10 ℃ mainly depends on the nature of asphalt,so it is very crucial for the selection and basis for evaluation of asphalt.This Paper combines the research results of SHRP with traditional criterion,making a comparative analysis on the low-temperature performance of the four kinds of asphalt including asphalt KLM70^#,KLM90^#,and KLM110^#,and SBS finished product asphaltum through bending creep test,penetration test,and ductility test.The research results show that the best low temperature crack resistance is SBS modified asphalt.Larger is the asphalt grade,better is the low temperature performance.After adopting RTFOT,the ductility at 10 ℃ can distinguish the difference of low temperature resistance of modified asphalt in a more reasonable way,and it is feasible to evaluate the low temperature of asphalt binder with the indicators such as T1.2、5 ℃ ductility and 15 ℃ penetration.

关 键 词：沥青结合料 抗裂性 试验 KLM沥青 SBS改性沥青 

分 类 号：U414.1[交通运输工程—道路与铁道工程]