| 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017Pa·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(028±003）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. |
| 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 |
| DOI：103969/j.issn1007 9629201505016 |
| 分类号: |
| 基金项目: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) |
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| Determination of Construction Temperature of Recycled SBS Modified Asphalt Mixture |
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GAN Xinli1, ZHENG Nanxiang1, HOU Yueqin2, JI Xiaoping1
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1.Key Laboratory for Special Area Highway Engineering of Ministry of Education, Changan University, Xi An 710064,China;2.School of Human Settlements and Civil Engineering, Xian Jiaotong University, Xian 710049, China
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| Abstract: |
| The mixing torques of recycled SBS modified asphalt mixture under different mixing temperatures were determined. The optimal mixing torque of matrix asphalt mixture corresponding to the isoviscous temperature of 017 Pa·s on viscosity temperature curve of matrix asphalt was determined, and the mixing temperature corresponding to the optimal mixing torque on the mixing torque mixing temperature fitting curve of recycled 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 determined, and the viscosity temperature curve of recycled SBS modified asphalt under this shear rate was obtained through experiment. The isoviscous temperature of (028±003）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 determine the optimal mixing temperature of recycled SBS modified asphalt mixture is reasonable. |
| Key words: road engineering construction temperature mixing torque recycled asphalt mixture shear rate |
