Many agencies are interested in using a rapid test method for measuring the electrical properties of concrete (i.e., the resistivity or conductivity) since the electrical properties can be related to fluid transport (e.g., ion diffusion) and durability. The advantage of electrical testing is that it is relatively easy to perform and the test method is relatively fast (less than a minute). Over the last century, many studies have investigated different approaches for measuring electrical properties. This presentation describes several rapid testing approaches and discusses key issues of the test including: 1) specimen geometry, 2) test repeatability, 3) pore solution chemistry, 4) sample moisture content and 5) sample temperature. This paper indicates that when the key issues are properly considered there can be significant benefits in using electrical resistivity testing for reducing the cost (in terms of time and money) associated with testing to provide rapid, reliable measurements for quality control and acceptance.
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