关键词: 道路工程;水泥冷再生混合料;试验研究;疲劳特性;疲劳方程

Abstract: Qinghai is located in seasonally frozen soil region,and its complex natural environment brings serious impact to asphalt pavement.In order to analyze the fatigue properties of CCRM systematically in the region,taking asphalt pavement milling recycling material of different gradation as a benchmark,by proposing the indoor experiments,studying the fatigue properties of CCRM that had different amount of cement content.The results show that there is a good double logarithmic relationship between fatigue life and stress level,lgS=a-blgN,the regression coefficient a is 0.116-0.161,and b is 0.068-0.084.The proportion of base and surface has great influences on fatigue properties of CCRM,when the proportion of base and surface is 12:5,the fatigue properties is better than that under the condition when the proportion of base and surface is 1:1.The amount of cement content almost has no influence on the fatigue properties of CCRM.Under the condition of different amount of cement content and same proportion of base and surface,the change law of lgN with lgS is basically the same.

Key words: road engineering;cement cold recycling mixture;experimental study;fatigue property;fatigue equation