结构工程师2017，Vol.33Issue(4)：47-54,8.
电化学腐蚀对钢筋与混凝土粘结强度的影响
Influence of Electrochemical Corrosion on Reinforced-concrete Bond Strength
摘要
Abstract
Accelerated corrosion tests of reinforced-concrete specimens and pull-out tests of corroded specimens were carried out to study the influence of electrochemical corrosion on reinforced-concrete bond strength.To make a deep analysis,electrochemical corrosion test of 42 reinforced-concrete specimens was carried out by full-wet current flow method,and uniaxial pull-out test of specimens with different corrosion ratio was carried out,and the dynamic slip value and drawing force of the loading end were monitored in the whole pull-out process.According to the pull-out test,during the initial stage of electrochemical corrosion,reinforcedconcrete bond strength increased compared with uncorroded ones,while the bond strength decreased when the corrosion ratio reached a certain value.For round bars,the maximum drawing force of specimens corroded by 3％ sodium chloride solution peaked,and as for specimens corroded by 1.5％ sodium chloride solution,2.5％ sodium sulfate solution,mixed solution of 2.5％ sodium sulfate and 1.5％ sodium chloride,and 5％ sodium sulfate solution,the maximum drawing force is in a decreasing manner.For deformed bars,the maximum drawing force of specimens corroded by mixed solution of 5％ sodium sulfate and 3％ sodium chloride peaked,and as for specimens corroded by 1.5 ％ sodium chloride solution,5 ％ sodium sulfate solution,2.5 ％ sodium sulfate solution,mixed solution of 2.5％ sodium sulfate and 1.5％ sodium chloride,the maximum drawing force is in a decreasing manner.关键词
锈蚀钢筋混凝土/电化学腐蚀/粘结强度/粘结滑移/耐久性Key words
corroded reinforced concrete/electrochemical corrosion/bonding strength/bond-slip/durability引用本文复制引用
罗文森,刘颖峰,李福海..电化学腐蚀对钢筋与混凝土粘结强度的影响[J].结构工程师,2017,33(4):47-54,8.基金项目
国家自然科学基金项目(51308471) （51308471）
中央高校基本科研业务费专项资金资助(2682015ZD13) （2682015ZD13）
