Abstract: In order to determine the key factors affecting the fatigue performance of asphalt stabilized macadam base, based on two kinds of dense asphalt stabilized macadam mixtures such as ATB25 and ATB30, 9 types of aggregate gradation and 3 types of asphalt were selected, and 10 items of material test data of 13 kinds of mixture specimens were taken as the reference column; the k value and n value in the fatigue equation of asphalt stabilized macadam were taken as the comparison column. The grey entropy analysis that affected the fatigue performance of asphalt stabilized macadam was carried out. The influence degree of different parameters on the fatigue performance of asphalt stabilized macadam was obtained. Furtherly, on this basis, the statistical research method of correspondence analysis was used to unify the relevant conclusions. The research results show that asphalt saturation and asphalt aggregate ratio of asphalt mixture are the two key factors affecting the fatigue performance of asphalt macadam stabilized base. The asphalt saturation affects the asphalt volume percentage and the ratio of the mineral material gap, while the change of asphalt aggregate ratio will cause the change of asphalt saturation and asphalt film thickness, which will significantly affect the fatigue life of asphalt mixture.

Key words: highway engineering; asphalt stabilized macadam; fatigue performance; grey entropy analysis; correspondence analysis; highway engineering

摘要： 为了确定影响沥青稳定碎石基层疲劳性能的关键因素，基于ATB25与ATB30两种密集配沥青稳定碎石混合料，选择9种集料级配、3种沥青，以13种混合料试件的10项材料试验数据为参考列，以沥青稳定碎石疲劳方程中的k值与n值为比较列，进行影响沥青稳定碎石疲劳性能的灰熵分析，得到不同参数对沥青稳定碎石疲劳性能影响的显著程度，并在此基础上运用对应分析的统计学研究方法对相关结论进行统一。研究结果表明：沥青混合料的沥青饱和度、油石比这两项因素是影响沥青碎石稳定基层疲劳性能的最关键因素；沥青饱和度影响着沥青体积百分率和矿料间隙率，而油石比的变化会导致沥青饱和度和沥青膜厚度随之变化，从而显著影响沥青混合料的疲劳寿命。

关键词: 道路工程；沥青稳定碎石；疲劳性能；灰熵分析；对应分析；道路工程