水泥稳定碎石抗裂性能指标研究  

Research on Crack Resistance Properties Index of Cement Stabilized Macadam

作　　者：孙兆辉[1] 

机构地区：[1]沈阳建筑大学,辽宁沈阳110168

出　　处：《公路工程》2009年第3期68-72,共5页Highway Engineering

摘　　要：目前通常采用干缩抗裂系数[T]=εmax/αd和温缩抗裂系数[W]=εmax/αt两大指标来评价水泥稳定碎石基层材料的抗裂性能。但试验研究中发现平均干缩系数αd和温缩系数αt存在变化无规律等特点,用其作为评价指标存在质疑。通过试验研究,提出采用压折比和抗裂安全系数作为水泥稳定碎石基层材料抗裂性能的评价指标。Crack resistance coefficient of dry shrinkage and temperature shrinkage are generally adopted to evaluate crack resistance properties of cement stabilized macadam base course materials at present. But it is found that average dry shrinkage coefficient αd and temperature shrinkage coefficient αt are ordinarily ruleless in trial. It is oppugn that using the two indexes to evaluate rack resistance properties. Compression break ratio and crack resistance safe coefficient are put forward to evaluate crack resistance properties of cement stabilized macadam base course materials by trial in the paper.

关 键 词：水泥稳定碎石 抗裂性能 劈裂模量 劈裂应变 压折比 抗裂安全系数 

分 类 号：U416.03[交通运输工程—道路与铁道工程]