改性沥青在盐冻融循环条件下的性能研究  

Research On The Performance Of Modified Asphalt Under The Salt Frost Thawing Cycle

作　　者：李超[1] 韩吉伟 刘振正 李震[1] 

机构地区：[1]内蒙古工业大学土木工程学院 [2]内蒙古交通建设质量监督局,呼和浩特010051

出　　处：《内蒙古工业大学学报（自然科学版）》2014年第1期56-61,共6页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：国家自然科学基金(11162010)

摘　　要：通过室内冻融循环试验,对SBS改性沥青和胶粉改性沥青在盐冻融循环前后的三大指标(针入度、软化点、延度)进行了测试。结果表明:两种沥青经盐冻融循环后,温度敏感性增加,高温性能及低温性能均有不同程度降低,且冰冻温度、融雪剂浓度、冻融循环次数对这两种沥青性能影响的程度不同,并通过对两种沥青材料盐冻融循环前后的各项指标对比,发现胶粉改性沥青抗盐冻循环性能优于SBS改性沥青。Routine test of three indicators （penetration ,softening point and ductility ） for SBS mod-ified asphalt and rubber powder modified asphalt was conducted in accordance with the relevant specifi-cation throngh indoor salt frost thawing cycle test .The analysis results show that thermal performance of SBS modified asphalt and rubber powder modified asphalt by the salt frost thawing cycle ,temperature susceptibility increase and high temperature performance ,low temperature performance and freezing temperatures ,the deicing salt concentration ,freeze-thaw cycles of these two different kinds of asphalt performance of the significantly different degrees .And through the two bituminous material salt frozen cycle index contrast ,rubber modified asphalt salt freezing cycle performance is better than SBS modified asphalt .

关 键 词：SBS改性沥青 胶粉改性沥青 盐冻融循环 温度敏感性 高低温性能 

分 类 号：U214.75[交通运输工程—道路与铁道工程]