一种改进的混凝土电阻率测量方法  

An Improved Method for Measuring the Electrical Resistivity of Concrete

作　　者：王立霞[1,2] 

机构地区：[1]河南建筑职业技术学院工程管理系,郑州450064 [2]河南省建筑工程学校,郑州450064

出　　处：《武汉理工大学学报》2013年第12期52-56,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50404005)

摘　　要：通过改进混凝土电阻率测量的方法,采用小电极形式埋入混凝土内部不同深度,用恒电位仪进行电阻测量,可以实现对混凝土内部不同深度处电阻的连续监测。比较分析了依据2cm和4cm两个电极间距测量的混凝土电阻率结果所计算的变异系数的变化。研究了环境湿度对混凝土试件不同深度电阻率的影响及在自然和标准两种养护条件下混凝土电阻率随深度的变化,并且对浸水前后不同深度混凝土电阻率的变化率进行了分析,分析表明,表层混凝土的电阻率对干燥行为非常敏感。从而证实该方法有效可行,重现性好,结果稳定。We achieved the continuous measurement of the electrical resistivity at different depths inside concrete using a PS-6 potentiostat by a modified measurement method of electrical resistivity, with the samples whose small electrode form embedded at different depths inside concrete. The changes of the calculated variable coefficients were compared and analyzed according to the electrical resistivities of concrete which were tested between two electrodes of 2 cm and 4 cm. The influence of environment humidity on the electrical resistivity of concrete samples at different depths was studied, and the change of the electrical resistivity of concrete with the change of depths was also researched under the natural and cu- ring conditions. The rates of change of electrical resistivity of concrete at different depths were analyzed before and after soaking. It is clearly shown that the surface layer of concrete is much more sensitive to the drying behavior. It is proved that this modified method is stability, effectiveness and reproducibility.

关 键 词：混凝土 电阻率 测量方法 改进 

分 类 号：TU528.01[建筑科学—建筑技术科学]