【摘要】 近年来,国外提出了永久性沥青路面结构的设计方法,其理论基础为沥青混合料的疲劳极限理论。针对LSM沥青碎石基层混合料,采用四点梁弯曲疲劳试验进行了试验验证。文章选择4种应变控制水平、2种油石比进行LSM混合料的疲劳试验,并采用AASHTO T321和简化能量消散率方法进行试验数据分析。试验结果表明:LSM沥青混合料在低应变水平下存在疲劳极限现象。试验验证了永久性沥青路面的设计理论。更多还原

【Abstract】 Recently the research of Perpetual Pavement is more popular abroad,and the base of structure design method for the Perpetual Pavement is the theory of the HMA Fatigue Limit.In the article,the laboratory study for the fatigue characteristic of LSM Base Mixture chooses the Four Point Beam Bending Test method with four kinds of strain level and two kinds of asphalt content,and the two kinds of data analysis methods including AASHTO T321 method and reduced dissipated energy ratio method are used.Based on the analysis of the fatigue tests,the fatigue limit for the LSM Base Mixture on the lower strain level is verified,and the theory base of Perpetual Pavement is verified through tests.更多还原