Detection and Quantification of Corrosion Damage Using Ground Penetrating Radar (GPR)

This research aims to detect the damage due to corrosion of reinforcing steel in concrete structures using ground penetrating radar (GPR) and conventional method, half-cell potential (HCP). A method to accelerate corrosion of steel rebar in concrete samples to different degrees is applied, the method consists of introducing a direct current (DC) power supply and 5% sodium chloride (NaCl) solution as an electrolyte to the rebar to induce significant corrosion within a short period of time. The 2 GHz GPR is used to detect the corrosion in the reinforced concrete slabs after 28 days of standard moist preservation. The results are compared with those obtained using the HCP method. Both of the GPR and the HCP show good performance in determining the degree of corrosion.