摘要
为研究沥青材料的高温性能,利用动态剪切流变试验和多应力蠕变恢复试验的方法,选用70#基质沥青、SBS改性沥青及埃索高粘沥青进行对比试验,分析了它们在不同应力和温度条件下粘、弹响应的变化规律。实验结果表明:车辙因子忽略了沥青材料的延迟变形,用来评价改性沥青的高温性能存在着较大的不足;多应力蠕变恢复试验与路面抗车辙能力具有更好的相关性,用恢复率和不可恢复蠕变柔量等评价指标能更全面地评价沥青材料的高温性能。
In order to study the high temperature performance of the asphalt,the dynamic shear rheological test and the multiple stress creep recovery test was carried out.With70#matrix asphalt,SBS modified asphalt and Esso highly viscous asphalt as a comparison,their viscoelastic response change rule in different conditions of stress and temperature was analyzed.The results show that：Rutting factors used for evaluating the high temperature of the modified asphalt performance are insufficient,because the delay distortion of asphalt is ignored.The multiple stress creep recovery test has a better correlation with pavement rutting resistance,the recovery rate and irrecoverable creep compliance evaluation index can evaluate the high temperature performance of the asphalt more efficiently.
出处
《交通科学与工程》
2015年第1期9-13,共5页
Journal of Transport Science and Engineering
关键词
沥青材料
动态剪切流变试验
多应力蠕变恢复试验
高温性能
asphalt
dynamic shear rheological test
multiple stress creep recovery test
high temperature performance
