沥青混合料表面构造水平及分布特性预测模型

发布时间：2018-08-19 07:48

【摘要】：为了在设计阶段评价和预测沥青混合料表面构造水平及其分布特性,运用提出的沥青混合料表面构造水平及分布特性二维图像测试方法,测试了具有不同设计参数的沥青混合料不同波长处的表面构造水平.研究了设计参数对沥青混合料表面构造水平的影响规律,结果表明,随着空隙率、集料粒径的增大,沥青混合料表面构造特征波水平值增大;而随着沥青饱和度、集料级配分形维数,及截面上单位面积内集料方向角正弦值、集料规则度、集料间接触长度的增加,沥青混合料表面构造特征波水平值降低.在此基础上,建立了基于设计参数的沥青混合料表面构造水平及分布特性预测模型,并通过试验检验了该预测模型的准确性,结果表明该模型可准确预测沥青混合料表面构造水平及其分布特性.
[Abstract]:In order to evaluate and predict the surface structure level and its distribution characteristics of asphalt mixture in the design stage, the two-dimensional image testing method for surface structure and distribution characteristics of asphalt mixture is proposed. The surface structure level of asphalt mixture with different design parameters at different wavelengths was tested. The influence of design parameters on the surface structure level of asphalt mixture is studied. The results show that with the increase of void ratio and aggregate particle size, the level of characteristic wave of surface structure of asphalt mixture increases, while the level of surface structure characteristic wave increases with the saturation of asphalt. The fractal dimension of aggregate gradation, the sinusoidal value of aggregate direction angle in unit area, the regular degree of aggregate and the contact length between aggregates decrease the horizontal value of characteristic wave of asphalt mixture surface structure. On this basis, a prediction model of asphalt mixture surface structure level and distribution characteristics based on design parameters is established, and the accuracy of the prediction model is verified by experiments. The results show that the model can accurately predict the surface structure level and distribution characteristics of asphalt mixture.
【作者单位】：西南交通大学土木工程学院;西南交通大学高速铁路线路工程教育部重点实验室;长安大学特殊地区公路工程教育部重点实验室;长安大学公路学院;
【基金】：国家自然科学基金面上资助项目(51578076,5178467) 中央高校基本科研业务费科技创新资助项目(2682016CX009) 中央高校基本科研业务专项费“特殊地区公路工程教育部重点实验室”开放基金资助项目(310821171103)
【分类号】：U414

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