Resistivity Measurement with ResiPod Resistivity Meter

Measuring surface resistivity is crucial to determine the state of the concrete structure. Surface resistivity is known to be directly related to the chances of corrosion occurring and the rate of corrosion. Studies have shown a direct correlation between chloride diffusion rate and resistivity, too. For this reason, a ResiPod resistivity meter is used to measure concrete resistivity in a non-destructive manner. The ResiPod is a comprehensive four-point Wenner probe device. It is extremely fast, accurate and reliable device for conducting resistivity measurements. High-quality resistivity meters come with a waterproof and robust housing that can be used in the most demanding job environments.

Resistivity is among the major factors that become present at the onset of corrosion, which requires a flow of ions between cathodic and anodic sites on the reinforcement in the concrete. Resistivity is the one responsible for controlling the rate of the flow of ions. Hence, it directly controls the rate of corrosion in concrete. By measuring concrete resistivity with a ResiPod, it will be easier to determine if the corroding structure will deteriorate fast or slow. With that information, it will be easier to come up with solutions to address the situation. Resistivity measurement can be used in conjunction with a half-cell potential measurement to find the exact areas where corrosion is likely to take place.

With a ResiPod, you can easily and quickly conduct a surface resistivity test to estimate concrete permeability. Rapid chloride penetration used to be the traditional testing method for this, but it can be labour-intensive and could take about four days. The Florida Department of Transport initiated a study in 2002 and discovered the strong correlation between resistivity measurements and rapid chloride penetration measurements. This discovery enabled permeability testing to be accomplished in 10 minutes using the same cores or cylinders used in compressive strength testing.

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