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橡胶颗粒沥青混合料的级配设计

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Keywords: 道路工程,设计方法,橡胶颗粒沥青混合料,主骨料嵌挤,优化

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Abstract:

分析了橡胶颗粒沥青混合料的结构组成特点与防冻抗滑作用机理.为保证橡胶颗粒沥青混合料的结构整体性和密实性,确定混合料类型采用骨架密实结构.由于橡胶颗粒的密度与集料的密度差距较大,传统沥青混合料级配组成范围和设计方法显然已不再适用于橡胶颗粒沥青混合料.根据橡胶颗粒沥青混合料的材料组成特点,针对橡胶颗粒沥青混合料进行了基于主骨料嵌挤的体积法优化,提出了橡胶颗粒沥青混合料的级配设计方法.依据此级配设计方法进行了橡胶颗粒沥青混合料配合比设计实例分析.结果表明按照此级配设计方法设计的橡胶颗粒沥青混合料各项技术指标均满足规范要求,设计的橡胶颗粒沥青混合料具有良好的路用性能.

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