利用分形理论可以研究复杂无序混乱现象和不规则形态的规律及局部和整体之间的本质关系。沥青混合料是一种结构复杂的混合物,它存在着多种分形。级配组成是影响沥青混合料的重要方面,也存在着分形。本文运用分形理论对AC-13沥青混合料级配分维特征进行了研究,并通过马歇尔试验的结果分析级配分维数与马歇尔试验参数的相关性,探讨级配分维数与混合料体积参数的关系。结果表明,AC-13沥青混合料级配分维数随级配由细增粗呈逐渐减小趋势,分维数作为级配的量化值可以应用到建立级配与混合料体积特征指标的关系式上,这对沥青混合料的级配设计具有一定的指导作用。 The fractal theory can be used to study the law of complex chaotic disorder and irregular morphology as well as the essential relationship between the local and the whole. Asphalt mixture is a complex structure of the mixture, it exists a variety of fractal. Gradation composition is an important aspect affecting asphalt mixture, there are also fractal. In this paper, fractal theory was used to study the graded fractal dimension of AC-13 asphalt mixture. The correlation between grading fractal dimension and Marshall test parameters was analyzed by the results of Marshall test, and the relationship between graded fractal dimension and the volume parameter of the mixture . The results show that the graded fractal dimension of AC-13 asphalt mixture tends to decrease gradually with grading, and the fractal dimension as the quantified grading value can be used to establish the relationship between grading and the volumetric characteristics of the mixture On the gradation design of asphalt mixture has a certain guiding role.