基于复合改性方法的岩沥青低温性能改性  

Improvement of Low-temperature of BRA Modified Asphalt by Compound Modifying Method

作　　者：陈晨 CHEN Chen(Hunan Longlang Expressway Construction and Development Co.,Ltd,Changsha,Hunan 410000,China)

机构地区：[1]湖南省龙琅高速公路建设开发有限公司,湖南长沙410000

出　　处：《公路工程》2018年第3期293-296,共4页Highway Engineering

摘　　要：为了改善岩沥青的低温性能,采用两种改性剂[丁苯橡胶(SBR)、纳米碳酸钙(nano-Ca CO3)]对布敦岩沥青(BRA)改性沥青进行复合改性。以布敦岩沥青(BRA)改性沥青为研究对象,分别将两种改性剂掺入到BRA改性沥青中,通过低温弯曲梁蠕变试验(BBR),测定两种复合改性沥青在3种掺量和3个试验温度下的蠕变柔量,从蠕变柔量值来评价复合改性剂对岩沥青改性沥青低温性能的改善效果。研究结果表明:两种复合改性沥青中,布敦岩沥青SBR复合改性沥青的低温抗裂性能最好,布敦岩沥青nano-Ca CO3复合改性沥青次之。In order to improve the low temperature performance of the asphalt modified by Buton Rock Asphalt（BRA）,two composite modifiers,SBR and nano-CaCO_3,are added into the BRA modified asphalt,then adopting bending beam rheometer（BBR） creep test in low-temperature to determinate creep stiffness module of two BRA composite modified asphalt in two mixing amounts of modifiers and three kinds of test temperature. Creep compliance is adopted for the evaluation on the improvement effect of low temperature performance of composite modified asphalt. The results show that BRA-SBR polymer composite modified asphalt＇s low-temperature performance is best and BRA-nano-CaCO_3 composite modified asphalt＇s low-temperature performance is next to the former.

关 键 词：布敦岩沥青 低温性能 弯曲蠕变试验 丁苯橡胶(SBR) 纳米碳酸钙(nano-Ca CO3) 

分 类 号：U416.217[交通运输工程—道路与铁道工程]