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工程力学  2012 

基于细观力学的沥青混合料动态模量预测

DOI: 10.6052/j.issn.1000-4750.2011.01.0024, PP. 13-19

Keywords: 道路工程,动态模量,细观力学,复合材料,沥青混合料,黏弹性

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Abstract:

为了建立能够表征组分材料性能及细观结构特征的沥青混合料动态模量预测模型,根据复合材料细观力学理论,将沥青混合料视为由沥青胶浆包裹的集料颗粒嵌入于有效沥青混合料介质中的复合材料,考虑集料尺寸、级配组成和空隙的影响,建立了沥青混合料动态模量三相细观力学预测模型。结合组分材料性能研究,应用该预测模型求解得到了动态模量,其与试验值比较结果表明,预测值较试验值小,产生此差异的原因可归结为模型的适用条件与真实细观结构的差别;据此对预测模型进行了修正,提出了考虑沥青膜厚度的动态模量细观力学分析方法;鉴于集料与沥青胶浆之间的力学特性差异,简化了预测模型求解参数,给出了参数值的范围。

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