多年冻土地区沥青混合料劈裂抗拉性能分析  

Research on Splitting Properties of Asphalt Mixture in Permafrost Soil

作　　者：韦佑坡[1] 张聚昆[2] 赵文建[3] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]石家庄铁道学院四方学院,河北石家庄051132 [3]长沙理工大学,湖南长沙410076

出　　处：《现代交通技术》2009年第6期11-13,20,共4页Modern Transportation Technology

摘　　要：根据青藏地区年平均气温低、温差大等气候特点,采用室内劈裂抗拉试验,研究温度、油石比对沥青混合料劈裂抗拉性能的影响及其作用规律。研究结果表明,较低温度时,劈裂强度、劲度模量随油石比的增大而减小,拉伸应变随油石比的增加而增大;低温度时,劈裂强度、劲度模量随油石比的增大而增大,拉伸应变随油石比的增加而减小。运用二元方差分析温度和油石比对劈裂抗拉性能的影响程度,结果显示,温度对劈裂抗拉性能的影响显著,油石比对劈裂强度影响较大。The effects of the temperature,the asphalt aggregate ratio on its splitting characteristics were investigated in the laboratory combining with the climate feature of low annual mean temperature and large temperature difference in Qinghai Tibet Area. The results showed that the splitting strength and stiffness modulus of asphalt mixture decreases with the increasing of the asphalt-aggregate ratio,and flexure tensile strain increases. the splitting strength and stiffness modulus of asphalt mixture increases with the increasing of the asphalt-aggregate ratio,and flexure tensile strain decreases. The effects of the temperature,the asphalt-aggregate ratioon its splitting characteristics were investigated by two-way anova showed that the temperature have significant effect on splitting characteristics and the asphalt-aggregate ratioonn have larger effect on splitting strength.

关 键 词：沥青混合料 劈裂抗拉性能 试验研究 多年冻土地区 

分 类 号：U414[交通运输工程—道路与铁道工程]