珊瑚骨料混凝土中钢筋的开始锈蚀模型  

Model of Reinforcement Incipient Corrosion in Coral Aggregate Concrete

作　　者：牛荻涛[1,2] 孙振 张路 陈昊[1] NIU Ditao;SUN Zhen;ZHANG Lu;CHEN Hao(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;State Key Laboratory of Green Building in Western China,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学省部共建西部绿色建筑国家重点实验室,陕西西安710055

出　　处：《建筑材料学报》2021年第5期977-985,共9页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51590914,51808438)。

摘　　要：采用线性极化法和电化学交流阻抗谱法,分析了不同电压下珊瑚骨料混凝土中钢筋腐蚀电位和腐蚀电流的时变性;测试了珊瑚骨料混凝土和普通混凝土的电阻率和孔隙率,研究了2种混凝土的临界氯离子浓度.结果表明:在相同电压下,珊瑚骨料混凝土腐蚀电位的稳定期和腐蚀电流的平稳期较普通混凝土短;珊瑚骨料混凝土的临界氯离子浓度小于普通混凝土.The time-varying of the corrosion potential and corrosion current of coral aggregate concrete reinforcement at different voltage values was analyzed by linear polarization resistance and electrochemical impedance spectroscopy.The resistivity and porosity of coral aggregate concrete and ordinary concrete were tested.The critical chloride ion concentration of two kinds of concrete was studied.The results show that the stable period of corrosion potential and corrosion current of coral aggregate concrete is shorter than that of ordinary concrete under the same voltage.The critical chloride ion concentration of coral aggregate concrete is lower than that of ordinary concrete.

关 键 词：珊瑚骨料混凝土 临界氯离子浓度 开始锈蚀 线性极化 电化学交流阻抗谱 

分 类 号：TU502.5[建筑科学—建筑技术科学]