More and more evidences showed that flow rutting^ inter - Ifcyer slippage of asphalt pavement on intersections and large longitudinal slope has direct relation to the asphalt mixtures shear flow deformation resistance capacity. This paper based On fractal theory analyzes the micro structure of asphalt mixture AC-13 ,SMA-13,Sup-13 aiid its volume fractal dimension was determined. Discusses the relation between asphalt mixtures volume fractal dimension and shear property by triaxial repeated load creep tests. The research conclusiens have certain guiding significance for the further study of asphalt mixtures shear failure mechanism.%越来越多的研究表明沥青面层失稳流动产生的车辙变形、交叉口及长大纵坡路段沥青层间推移、拥包变形等破坏都与沥青混合料抵抗剪切流动变形的能力有着直接的关系.基于分形理论对AC-13、Sup-13和SMA-13 3种级配的微观结构进行分析,确定了3种级配的体积分形维数,并通过重复荷载蠕变试验对沥青混合料体积分形维数与其剪切性能的关系进行了探讨.对今后进一步研究沥青混合料剪切破坏机理有一定的指导意义.
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