中南大学学报（自然科学版）2011，Vol.42Issue(4)：1126-1132,7.
水-温作用下沥青混合料疲劳性能分析
Fatigue property analysis of asphalt mixture in water-temperature action
摘要
Abstract
Given the hot and humid weather conditions in Southern China, the water-temperature action of asphalt mixture was simulated by freeze-thaw cycle test method and the indirect tensile fatigue test of commonly used AC-25 asphalt mixture was carried out through CRT-NU14 pneumatic servo asphalt material testing machine at various stress levels. Then, fatigue curves and fatigue equations of different water-temperature conditions were obtained and the influencing factors of fatigue life, mechanical properties, fatigue characteristic parameters and fatigue failure features were analyzed. The results indicate that there is good linear relationship between stress level and fatigue life in double-logarithm coordinates which can serve as a basis to forecast fatigue life, and water action and temperature rise can significantly impact on fatigue life and mechanical properties of asphalt mixture which decline anti-fatigue properties of mixture in a large extent. Also, the fatigue failure features of shear and splitting combined effect in water-temperature action fully prove that it is reasonable to use freeze-thaw cycling simulate hot and humid environment.关键词
道路工程/沥青混合料/疲劳性能/水-温作用/疲劳方程Key words
road engineering/ asphalt mixture/ fatigue properties/ water-temperature action/ fatigue equation分类
交通工程引用本文复制引用
秦旻,梁乃兴,陆兆峰..水-温作用下沥青混合料疲劳性能分析[J].中南大学学报（自然科学版）,2011,42(4):1126-1132,7.基金项目
西部交通建设科技项(2008318814065) （2008318814065）
云南省交通厅科技项目(KJC2006-123) （KJC2006-123）
