Geoelectric Method
The geoelectric method is a non-invasive technique that measures electrical resistivity to assess the quality and integrity of reinforced concrete structures. By injecting an electric current through electrodes and measuring the resulting potential difference, it detects anomalies such as corrosion, water infiltration, voids, and inhomogeneities without damaging the structure.
Different electrode arrangements (arrays) like Wenner Alpha, Wenner-Schlumberger, Dipole-Dipole, and Pole-Dipole are used to optimize sensitivity and investigation depth based on the specific needs. This method is widely applied for corrosion diagnosis, detecting moisture ingress, and locating voids.
Its main advantages are rapid execution, versatility, and non-invasiveness, although data interpretation can be affected by external factors like temperature, water salinity, and nearby metals.