摘要
测定了不同拌和温度下再生SBS改性沥青混合料的拌和力矩,测定了基质沥青混合料在基质沥青黏温曲线0.17Pa·s的等黏温度下的最佳拌和力矩,并以此最佳拌和力矩在再生SBS改性沥青混合料拌和力矩-拌和温度拟合曲线上对应的拌和温度为该混合料的最佳拌和温度;根据最佳拌和温度下再生SBS改性沥青的黏度-剪切速率曲线,确定最佳拌和温度下再生SBS改性沥青的剪切速率,在该剪切速率下通过试验获得再生SBS改性沥青的黏温曲线,并以(0.28±0.03)Pa·s时的等黏温度作为再生SBS改性沥青混合料的最佳压实温度.表干法验证结果表明,上述方法确定的再生SBS改性沥青混合料最佳拌和温度是合理的.
The mixing torques of recycled SB5 modlhed asphalt mixture under clllIerent mixing temperatures were determined. The optimal mixing torque of matrix asphalt mixture corresponding to the isoviscous temper- ature of 0.17 Pa. s on viscosity-temperature curve of matrix asphalt was determined, and the mixing tempera- ture corresponding to the optimal mixing torque on the mixing torque-mixing temperature fitting curve of recy- cled SBS modified asphalt mixture could be seen as the optimal mixing temperature of recycled SBS modified asphalt mixture. According to the viscosity-shear rate curve of recycled SBS modified asphalt at the optimal mixing temperature, the shear rate of recycled SBS modified asphalt at the optimal mixing temperature was de- termined, and the viscosity-temperature curve of recycled SBS modified asphalt under this shear rate was ob- tained through experiment. The isoviscous temperature of （0.28 ±0.03） Pa. s on the viscosity-temperature curve of recycled SBS modified asphalt could be seen as the optimal compaction temperature of recycled SBS modified asphalt mixture. The surface-dry method validation results show that with the above method to de- termine the optimal mixing temperature of recycled SBS modified asphalt mixture is reasonable.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2015年第5期808-812,共5页
Journal of Building Materials
基金
国家自然科学基金资助项目(51408044)
中国博士后科学基金资助项目(2013M532004)
中央高校基本科研业务费专项资金资助项目(CHD2011JC164)
甘肃省科技支撑计划项目(1011GKCA020)
关键词
道路工程
施工温度
拌和力矩
再生沥青混合料
剪切速率
road engineering
construction temperature mixing torque
recycled asphalt mixture
shearrate
作者简介
甘新立（1988-），男，陕西汉中人，长安大学博士生．研究方向为路面工程．E-mail：ganxinli2007@126．Com
