摘要
采用动态剪切流变仪对布敦岩沥青(BRA)改性沥青高温动态流变性能进行试验研究。结果表明,BRA改性沥青的温度敏感性随岩沥青掺量的增加而降低;岩沥青掺量达到20%时,BRA改性沥青的PG分级要高于基质沥青一个温度等级;掺量达到40%时,BRA改性沥青的车辙因子接近于SBS改性沥青;车辙试验结果与车辙因子关系表明岩沥青掺量的增多提高了沥青混合料的动稳定度,车辙因子适用于评价BRA改性沥青的高温性能。
Dynamic rheology properties of Buton rock asphalt modified asphalt binder at high temperature are studied by means of dynamic shear rheometer. Results show that the temperature sensibility of BRA modified asphalt binder becomes lower and lower as the content of BRA increases; that the PG classification of BRA modified asphalt is higher than that of base asphalt when the admixture ratio of BRA reaches 20% ; that the rutting factor of BRA modified asphalt cement is close to that of SBS modified asphalt cement, when the admixture ratio of BRA reaches 40 %. The relationship between rutting factor and results of wheel track test shows that increase in asphalt content of asphalt mixtures can improve the dynamic stability and rutting factor is suitable to evaluate BRA high temperature properties.
出处
《华东交通大学学报》
2010年第4期13-17,21,共6页
Journal of East China Jiaotong University
关键词
道路工程
BRA改性沥青
高温流变特性
DSR
PG分级
road engineering
BRA modified asphalt binder
rheology performance at high temperature
DSR
PG classification
作者简介
吕天华（1985-），男，硕士研究生，研究方向为道路与铁道工程。
