摘要
为更好地对回收的SBS改性沥青路面材料进行循环利用,采用延度、弹性恢复率、黏度、黏韧性等特征性指标对改性沥青多次老化再生效果进行评价。结果表明:随着老化与再生次数增多,各指标对老化与再生的敏感性不同,延度、韧性指标最敏感;多次老化再生的效果逐渐变差,典型的流变特性逐渐丧失,建议对SBS改性沥青进行3次以上再生时,可考虑将之作为老化的普通沥青使用。
In order to better recycle SBS modified asphalt pavement materials, the effects of repeated aging and recycling on the modified asphalt were evaluated by the characteristic indices such as ductility, elastic recovery rate, viscosity and tenacity. The results show that with the increase of the times of aging and recycling, the sensitivity of each index differs, and the ductility and tenacity were the most sensitive; the effect of repeated recycling gradually deteriorates, and the typical rheological properties are gradually lost. It is recommended that SBS asphalt which has been recycled for more than three times should be regarded as ordinary aged asphalt.
出处
《筑路机械与施工机械化》
北大核心
2017年第9期59-63,共5页
Road Machinery & Construction Mechanization
基金
国家科技支撑课题项目(2014BAC07B01)
关键词
SBS改性沥青
多次再生
效果评价
特征指标
SBS modified asphalt
repeated reeyeling
effect evaluation
characteristic index
