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ATB-25沥青混合料级配分形与马歇尔性能指标的相关性

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Keywords: 道路工程,沥青混合料,正交试验设计,级配分形,马歇尔性能指标

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Abstract:

沥青混合料的级配组成是影响混合料各项性能的重要因素,存在着分形特征。应用正交试验设计和统计分析方法,研究了ATB-25沥青混合料级配分维数值影响因素,及级配分维数值与马歇尔性能指标的相关性。研究结果表明,粗集料和细集料对级配分维数值影响均显著,其排序为细集料﹥粗集料;级配分维数值与ATB-25沥青混合料的空隙率、马歇尔稳定度、矿料间隙率、沥青饱和度均具有较好的相关性。利用级配分形规律,对具有不同分维数值的ATB-25沥青混合料的马歇尔性能指标进行了预估,使研究结论对指导ATB-25沥青混合料的配合比设计更具指导意义。

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