寒区沥青混合料劈裂抗拉特性研究  

Research on Tensile Characteristics for Cleavage of Asphalt Mixture in Cold Area

作　　者：韦佑坡[1] 王明利[1] 张思桐[1] 

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,西安710064

出　　处：《北方交通》2009年第8期8-11,共4页Northern Communications

摘　　要：结合青藏地区年平均气温低、大温差等气候特点,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。Following the features for law annual mean air temp and large temp differemce in Qing -Zang area, and by indoor tensile test for cleavage, the paper makes research on influence of the temp, rate of asphalt to aggregate on tensile performance for cleavage of asphalt mixture as well as their action law. Researching results show the cleavage strength and stiffness modulus lesson with growth of rate of asphalt to aggregate, the stretching strain grows with increment of rate of asphalt to aggregate when at lower temp; the cleavage strength and stiffness modulus grow with growth of rate of asphalt to aggregate and the tensile strain lessens with increment of rate of asphalt to aggregate when at low temp. Utilizing the binary variance analyzes extent of influence of temp and rate of asphalt to aggregate on tensile performance for cleavage. Results display the influence of temp on tensile performance for cleavage is remarkable, the influence of rate of asphalt to aggregate on cleavage strength is larger.

关 键 词：沥青混合料 劈裂抗拉试验 温度 油石比 

分 类 号：TU535[建筑科学—建筑技术科学]