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基于粘温特性的沥青混合料施工温度指标

, PP. 45-51

Keywords: 道路工程,沥青混合料,沥青胶浆,粘度,施工温度

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Abstract:

利用Brookfield粘度计测试了不同温度和不同粉胶比下70#基质沥青和70#改性沥青的胶浆粘度,分析了粉胶比和温度对沥青胶浆粘度和施工控制温度的影响,建立了粉胶比作为施工控制温度指标,得到不同粉胶比下沥青混合料的施工控制温度标准。结果表明粉胶比和温度对沥青胶浆的粘温特性有重要影响,主导着沥青混合料的施工控制温度;随着粉胶比的增大,胶浆粘度升高,粉胶比与胶浆粘度及其对数间具有良好的指数函数和线性函数相关性;随着温度的升高,沥青胶浆粘度降低,温度与胶浆粘度间具有很好的乘幂函数相关性。

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