基于流变学的RA改性沥青性能研究  

Study on properties of RA modified asphalt based on rheology

作　　者：刘黎萍[1] 王明[1] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《交通科学与工程》2014年第3期6-9,14,共5页Journal of Transport Science and Engineering

基　　金：江西省交通运输厅科技计划项目(2013C0012)

摘　　要：将沥青组分(RA)从印度尼西亚布敦岩沥青(简称为BRA)中抽提出来,作为基质沥青的改性剂。选取3个不同的掺配比例(10%,15%和20%),制备RA改性沥青。采用SHRP试验,对改性沥青的高温性能、低温性能及粘温性能进行研究。分析结果表明:BRA中的沥青组分是一种良好的天然改性剂。随着其掺量的增加,基质沥青的抗车辙因子和高温粘度均有所提高,高温性能和粘温性能均得到显著改善;低温时,蠕变劲度增大,蠕变劲度变化率变小,低温性能有所下降。因此,工程实际应用时,应兼顾沥青的高、低温及粘温性能,建议以基质沥青为基数,沥青组分的掺配比例不宜超过15%。RA was extracted out from the BRA as the asphalt modifier.Three different blending proportion（10%,15%和20%）are selected for the preparation of RA modified asphalt.SHRP test is used to study high-temperature properties,low temperature performance,viscosity-temperature properties of these modified asphalts.The results show that：RA bitumen component is a good natural modifiers,with the increase of its content,the asphalt rutting factor,high temperature viscosity increase significantly and high-temperature performance and viscosity-temperature properties are improved,low creep stiffness increases,low temperature performance decreases.Therefore,during the practical application of engineering,both high pitch,low-temperature and viscosity-temperature performance should be considered,it is proposed that base asphalt as the base,the proportion of bitumen blending component should not exceed 15%.

关 键 词：RA改性沥青 SHRP试验 流变性能 适宜掺量 

分 类 号：U416.217[交通运输工程—道路与铁道工程]