基于三维分形维数的沥青路面抗滑性能研究

Research of Skid Resistance of Asphalt Pavement Based on 3D Fractal Dimension

运用改进的立方体覆盖法计算路表微观构造三维分形维数。利用该方法计算了4种路面常用石料的沥青混合料试件的三维分形维数,并与摆式摩擦仪测量结果进行对比分析,结果表明:分形维数D越大,微观构造越丰富;分形维数D和摩擦系数值F是相互对应的,分形维数D越大,对应的摩擦系数F也越大,其抗滑性能越好。

An improved cubic covering method is used to calculate road surface microscopic structural 3D fractal dimension. The 3D fractal dimension of asphalt mixture specimens of 4 kinds of commonly used rock aggregate are calculated using this method,and the result is compared with the pendulum friction meter measured result. The result shows that（ 1） the larger the fractal dimensional D is,the more abundant the microscopic structure is;（ 2） the fractal dimension D keeps consistent with the friction coefficient F,the larger the fractal dimension D is,the larger the corresponding friction coefficient F is and the better its skid resistance is.