交流阻抗谱法在混凝土溶蚀中应用的研究  

Research on Electrochemical Impedance Spectroscopy for Leaching of Concrete

作　　者：于振云[1] 赵亚丁[1] 巴恒静[1] 吕建福[2] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150006 [2]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001

出　　处：《工程质量》2016年第1期24-27,共4页Construction Quality

基　　金：路桥健康监测用微型压电发电装置研制与理论研究(51208151)

摘　　要：通过交流阻抗谱法、电加速溶蚀法和EDTA滴定法研究了新浇筑混凝土试件溶蚀过程中特征点电阻与钙溶出含量之间的关系,基于新旧混凝土试件的特征点电阻值,判定历时10年以上的旧混凝土试件中溶出的钙含量大小。结果表明:相对新混凝土试件,旧混凝土试件的特征点电阻值较小,表明旧件均发生了不同程度的溶蚀;旧混凝土试件内部溶出的CaO质量均大于79.423 mg,溶出Ca^(2+)质量均大于56.730 mg。Electrochemical Impedance Spectroscopy（EIS）,accelerated electrochemical method and EDTA titration were used to evaluate the relationship between characterized resistance and content of dissolution of calcium in new concrete specimens. Also,based on characterized resistance of new and old concrete specimens,content of dissolution of calcium in old concrete specimens with more than 10 years was determined. The results of characterized resistance of old concrete specimens showed obvious reduction with respect to the new ones. What’s more,the content of dissolution of Ca O in old concrete specimens was more than 79.423 mg,with Ca2＋ more than 56.730 mg.

关 键 词：混凝土 溶蚀 交流阻抗谱法 电加速溶蚀 

分 类 号：TU528[建筑科学—建筑技术科学]