不同负载下基于电化学当量的钢筋锈蚀量预测  

Prediction of Reinforcement Corrosion Based on Electrochemical Equivalent under Loading

作　　者：滕海文[1] 杨森茂[1] 王卫仑[2] 霍达[1] 

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]深圳大学深圳市土木工程耐久重点实验室,广东深圳518060

出　　处：《建筑材料学报》2011年第4期478-481,485,共5页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50808005);北京市自然科学基金重大项目(8100001);深圳市土木工程耐久性重点实验室开放基金资助项目;深圳大学校科技创新团队项目(T200901)

摘　　要：进行了不同加载水平钢筋混凝土构件在杂散电流和5%(质量分数)NaCl溶液共同作用下的耐久性模拟试验,根据试验结果指出按照Faraday电解第一定律进行钢筋锈蚀量计算时应考虑荷载水平的影响.采用线性极化法测量了钢筋腐蚀电流密度,通过非线性拟合得到腐蚀电流密度变化函数,并以Faraday电解第一定律为基础得到了荷载对电化学当量的影响系数及考虑加载水平的基于电化学当量的钢筋锈蚀量预测计算公式,计算结果与钢筋锈蚀实际测量结果基本相符.Experiment is carried out to simulate different loading level element under coupling of stray current and 5%（by mass） chloride solution.When calculating corrosion of reinforcement,the influence of loading should be considered based on Faraday＇s first law of electrolysis.The corrosion current density was measured by the linear polarization resistance method.The function of corrosion current density was obtained by nonlinear fitting method.Based on the function of corrosion current density,the influence coefficient of loading level to electrochemical equivalent was obtained.The results show that the corrosion current density increases with the increase of stress ratio of concrete structures and through the influence coefficients of electrochemical equivalent the reinforcement corrosion weight can be calculated and the result is in agreement with the actual situation.

关 键 词：腐蚀电流密度 电化学当量 荷载水平 钢筋锈蚀 杂散电流 耐久性 

分 类 号：TU528.01[建筑科学—建筑技术科学]