Abstract: Fractal?is?a?new?theoretical?tool?to?study?the?wide-existence?of?statistical?self-similarity?characteristics?in?the?nature?and?it?has?a?powerful?function?in?describing?and?evaluating?those?phenomena?which?feature?in?the?continuity,irregularity?and?randomicity?of?layers.?Different?shear?performance?of?asphalt?mixtures?is?determined?by?different?gradation?curve?trend.?Taking?AC-16?Ⅰ?mixtures?as?an?example,?10?representative?tendencies?are?selected?from?gradation?specification,?and?fraetal?dimensions?of?these?10?gradations?are?calculated?quantitatively?according?to?fractal?theory.?The?rule?of?different?fractal?dimensions?influencing?the?shear?performance?of?asphalt?mixtures?is?studied?through?the?tri-axial?test.?And?the?reasonable?rangd?of?fractal?dimensions?of?highway?asphalt?mixtures?at?hill?and?plain?areas?is?given?from?the?perspective?of?shear?strength.

Key words: fractal method , asphalt pavement , shear strength , tri-axial test ;

摘要： 分形是研究自然界中大量存在的统计自相似特征的新的理论工具,在描述和评价一些具有层次连续性、不规 则性或随机性等特征的现象方面表现出很强的功能。不同级配曲线走向决定沥青混合料具有不同的抗剪性能。 以AC-16??混合料为例,在规范级配范围选取10种代表性走向,根据分形理论定量计算这10种级配的分形维数, 通过三轴试验研究了集料不同分形维数对沥青混合料抗剪性能的影响规律,从抗剪强度的角度给出了丘陵区公路 和平原区公路沥青混合料合理的分维值范围。

关键词: 分形方法, 沥青路面, 抗剪强度, 三轴试验