高强钢绞线网-聚合物砂浆加固层与RC结构黏结面性能试验  

Experiments on Bond Performance Between Reinforced Layer with Steel Wire Mesh and Polymer Mortar and RC Structures

作　　者：黄华[1] 刘伯权[1] 刘卫铎[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《中国公路学报》2009年第3期70-75,共6页China Journal of Highway and Transport

基　　金：河北省交通厅科学技术项目(Y-030117)

摘　　要：通过243个测点的正拉黏结强度试验和24个测点的剪切黏结强度试验,分析了聚合物砂浆与混凝土界面黏结性能,探讨了黏结强度的影响因素;结合试验数据提出了正拉黏结强度和剪切黏结强度的计算模型。结果表明:抹灰龄期、界面粗糙度、混凝土和砂浆强度、修补方位等是影响黏结性能的主要因素,其显著性水平按此顺序由高到低排列;随龄期增长、混凝土与砂浆强度提高,黏结强度增大,增幅降低;随界面粗糙度增大,黏结强度增大,但粗糙度并非越大越好;不同修补方位的黏结强度基本上遵循顶面大于侧面、侧面大于底面的规律。Based on the experiments about the tensile bond strength of 243 observation points and the shear bond strength of 24 observation points, the bond performance between polymer mortar and concrete was analyzed and the influencing factors of bond strength were explored. The calculated models of tensile bond strength and the shear bond strength were presented. The results show that the main influencing factors include four aspects： the first is curing age; the second is interface roughness; the next is the strength of concrete and mortar; the last is position of the repaired interface. Their significance levels from high to low are arranged according to this order. With the improvement of concrete strength, mortar strength and curing age, the bond strength increases, but the growth rate decreases. With the improvement of roughness, the bond strength also increases. But it is not the fact that the bigger the roughness is, the higher the bond strength is. The magnitude of the bond strengths on different repaired positions keeps to the order from top to flank to underside.

关 键 词：桥梁工程 聚合物砂浆 试验研究 加固 正拉黏结强度 剪切黏结强度 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]