论文部分内容阅读
该文以嵌挤密实型沥青混合料级配分形分析思路对比分析了连续级配和间断级配的分形特性,结果表明:连续级配、嵌挤密实型沥青混合料级配和间断级配具有二度域分形特征,可以按照二度域分形级配来研究。在此基础上,结合二度域级配分形特征图,引入参数K、ΔD、tana和∠a详细阐述了连续级配、嵌挤密实型沥青混合料级配和间断级配三者之间的内在关系;探讨了参数K的几何、物理意义及其与沥青混合料性能指标的相关性。研究结果表明:参数K、ΔD、tan a和∠a可定量反映连续级配、嵌挤密实性沥青混合料级配和间断级配三者之间的转化关系;其中参数K物理意义是粗细集料的相对粗细比,几何意义是二度域分形级配直角坐标系中级配坐标点与坐标原点连线的斜率;参数K可定量反映粗细集料的相互作用情况,可作为沥青混合料级配的分形评价指标,结合矿料级配分形参数,建立了沥青混合料级配分形指标体系。
In this paper, the fractal characteristics of continuous gradation and discontinuous gradation are compared and analyzed with the fractal analysis method of gradation of inset compact dense asphalt mixture. The results show that the gradation of continuous gradation and intergranular compaction asphalt mixture has The second-degree fractal features can be studied according to the second-order fractal gradation. On this basis, the parameters K, ΔD, tana and ∠a were introduced with the help of the second-order gradation fractal characteristic map to elaborate the relationship between continuous gradation, intimate compaction asphalt mixture gradation and discontinuous gradation Intrinsic relationship is discussed. The geometric and physical meaning of parameter K and its correlation with performance index of asphalt mixture are discussed. The results show that the parameters K, ΔD, tan a and ∠a can quantitatively reflect the transformation relations between continuous gradation, intimate compaction asphalt mixture gradation and discontinuous gradation. Among them, the physical meaning of parameter K is thickness The relative weight ratio of materials is the geometric meaning of the slope of the line connecting the coordinate points in the rectangular coordinate system of the second degree fractal grading with the coordinates. The parameter K can quantitatively reflect the interaction of the coarse and fine aggregates and can be used as the asphalt mixture gradation Fractal evaluation index, combined with fractal parameters of mineral gradation, fractal index system of asphalt mixture was established.