早期受冻对钢筋与混凝土黏结性能的影响  

Effect of Early-Age Frozen Damage on Bond Behavior of Steel and Concrete

作　　者：任慧韬[1] 刘丽霞[1] 王珏[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《建筑材料学报》2010年第6期796-801,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50608013);海岸和近海工程国家重点实验室(大连理工大学)研究开发基金资助项目

摘　　要：通过中心拔出试验,研究了早期受冻对钢筋与混凝土黏结性能的影响以及混凝土强度等级、施工期温度和养护条件对黏结滑移性能的影响,得出了不同养护条件下的荷载滑移曲线。结果表明:养护条件对黏结试件的破坏形式有较大影响;试件早期受冻后,钢筋与混凝土黏结强度下降,且混凝土强度等级越低,下降幅度越大.The effect of early-age frozen damage on bond-slip behavior of deformed reinforcement and concrete was investigated by center pull-out tests. The effects of different factors on bond-slip behavior were analyzed on the consideration of concrete strength, temperature during construction period, and curing conditions. The bond-slip curves in different curing conditions were obtained. The test results show that curing conditions have significant effect on the failure mode of bond specimens, the early-age frozen damage leads to the decrease of bond strength between reinforcemet and concrete. Furthermore, the lower concrete strength is, the more decrease of the bond strength.

关 键 词：混凝土 早期受冻 黏结强度 黏结滑移 

分 类 号：TU528.064[建筑科学—建筑技术科学]