Fig. 13From: Inspecting the corrosion state of underground reinforced concrete structuresElectrical resistance between the sensor and the steel reinforcement for gravel as filling material in moist and dry conditions measured with an LCR-meter with a frequency of 120 Hz measured in the upper and the lower row of holes in the wooden frame (see Fig. 11) where the red rectangle marks the location treated with sodium chloride during casting of the sampleBack to article page