基于电场作用的混凝土渗透性评价方法研究进展与展望  

Progress and Prospect of Testing Method Based on Electric Field in Evaluating Concrete Permeability

作　　者：钱觉时[1] 张琳[1] 贾兴文[1] 党玉栋[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《材料导报》2011年第21期124-128,共5页Materials Reports

基　　金：重庆市科技攻关计划(CSTC2009AC6204);中央高校基本科研业务费(CDJZR10130017)

摘　　要：渗透性是反映混凝土耐久性最为直接的指标,基于外加电场的作用可快速评价混凝土的渗透性。通过对比分析现有基于外加电场作用下的混凝土渗透性评价的测试手段,总结了不同方法的实验条件差异。认为应进一步研究外加电场的作用和混凝土的材料组成所引起的误差,加强评价方法的基础理论研究。提出了通过改变实验条件和引入混凝土电学性质变化率的定量评价方法的设想,以及重点开展在役混凝土结构评价方法研究的建议。Permeability is the most direct indicator to reflect the durability of concrete. Testing methods based on external electric field can be used to evaluate concrete permeability rapidly. The differences of testing conditions are summarized by analyzing the existing testing methods based on external electric field for concrete permeability evalua- tion. It is considered that the errors resulting from the external electric field and the concrete composition should be further studied as well as the basic theory of the testing methods. Methods for evaluating the concrete permeability using the rate of electric resistance variation under different conditions are recommended. In addition, it is also necessa ry to in-situ determine the permeability of concrete.

关 键 词：混凝土渗透性 电场 氯离子 电阻 

分 类 号：TU528.01[建筑科学—建筑技术科学]