用分形几何理论评价旧路面沥青混合料级配变异性

发布时间：2018-04-15 12:18

本文选题：道路工程 + 沥青混合料　；参考：《公路交通科技》2017年07期

【摘要】：为控制沥青混合料生产过程中级配变异过大,防止铺筑后的路面产生由混合料级配变异引起的病害,利用分形几何理论对级配的变异性进行研究,给出了控制级配变异性的技术参数。用分形几何理论推导出混合料级配的分形表达式,得到分形理论下描述级配变异性的方法;钻取有车辙病害的路面芯样,通过室内试验得到路面的实际级配数据,计算出相应的级配变异性大小,分析分形几何理论下的级配变异性情况。结果表明:分形几何理论能够很好地从另一个角度去描述沥青混合料的级配变异性,可以用具体的数值来体现实际道路的级配与生产配合比之间的变异情况,为沥青混合料级配提供新的技术参数,有效防止在沥青混合料生产施工过程中级配变异偏大,确保沥青混合料的级配符合工程要求。
[Abstract]:In order to control the excessive variation of intermediate distribution in the production process of asphalt mixture and prevent the disease caused by gradation variation of pavement after paving, the variation of gradation is studied by using fractal geometry theory.The technical parameters for controlling gradation variability are given.The fractal expression of mixture gradation is deduced by using fractal geometry theory, and the method of describing gradation variability under fractal theory is obtained, and the pavement core sample with rutting disease is drilled, and the actual gradation data of pavement is obtained by indoor test.The corresponding gradation variability is calculated and the gradation variability under fractal geometry theory is analyzed.The results show that the fractal geometry theory can describe the gradation variability of asphalt mixture from another point of view.This paper provides new technical parameters for asphalt mixture gradation, effectively prevents large variation of intermediate distribution in the process of production and construction of asphalt mixture, and ensures that the gradation of asphalt mixture meets the engineering requirements.
【作者单位】：武汉理工大学交通学院;中国市政工程中南设计研究总院有限公司;
【基金】：国家自然科学基金项目(51408446)
【分类号】：U414

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