摘要
基于硝酸银显色法测量,研究了氯离子变色深度、非稳态电迁移系数、初始电流与6 h电通量等混凝土抗氯离子渗透特征参数.结果表明:当初始电流小于80 mA或6 h电通量小于2 000 C时,变色深度与6 h电通量、初始电流与6 h电通量均有良好的线性关系,初始电流与变色深度之间的关系为Xd=0.15Iinitinal.通过测试初始电流,可以快速测估氯离子变色深度与6 h电通量.非稳态电迁移系数与6 h电通量不总是存在良好的相关性,不能用电通量的值来衡量氯离子在混凝土中的迁移特性.
Based on measurement of AgNO3 colorimetric method, characteristic parameters of chloride resistance of concrete, such as chloride color change depth （Xd）, non-steady state migration coefficient （ Dnssm）, initial current（Iinitial） and 6h charge passed （ PC-6h）, were investigated. Results indicate that when Iinitinal is less than 80 mA or 6PC-6h is less than 2 000C, there is good linear correlation between Xa and PC-6h as well as Iinitial and PC-6h-Xd =0. 15Iinitinal. Through measurement of Iinitial, Xd and PC-6h can be rapidly predicted. There is not always good correlation between Dnssmm and PC-6h, and so PC-6h can＇t be used for measurement of chloride migration property in concrete.
出处
《厦门理工学院学报》
2011年第4期61-65,共5页
Journal of Xiamen University of Technology
基金
国家自然科学基金项目(51072050
51108396)
厦门市科技局计划项目(3502Z20103042)
关键词
混凝土
氯离子渗透
特征参数
硝酸银显色法
concrete
chloride penetration
characteristic parameter
AgNO3 colorimetric method
