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基于复合材料细观力学模型的沥青混凝土弹性模量预测

, PP. 29-34

Keywords: 道路工程,沥青混凝土,细观力学模型,复合材料,有效性能,多夹杂

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Abstract:

?针对目前预测沥青混凝土弹性模量的主要方法(基于宏观层面的试验法和经验法)均未能反映其细观结构的问题,基于复合材料细观力学方法建立了沥青混凝土多相的2层嵌入式细观力学模型,求解得到单夹杂复合材料的2个弹性常数(弹性模量和剪切模量);结合多步骤方法,即将各档粒径集料与空隙逐一投入,然后进行均匀化,得到多夹杂复合材料弹性模量,并与试验值进行对比。结果表明:预测结果与试验结果基本相同;该方法能够反映各组成材料在沥青混凝土中所起的力学作用;沥青混凝土的空隙率、沥青胶浆的弹性模量对沥青混凝土的弹性模量有重要影响。

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