ABSTRACT
This study has been carried out to clarify changes to the properties of concrete surrounding anode material when cathodic protections is adopted to protect corrosion damage to reinforced concrete members. An accelerated impressed current was applied between anode and cathode within a short period, so that the accumulated current density corresponded to a period of 40 years. The specimens were soaked in water to increase the concrete's conductivity. The instant-off potential of the anode material remained higher than that obtained from NACE, but was within 4.0 V and thus satisfied NACE, After the accelerating impressed current test, a test was carried out on the adhesion test between lower concrete and overlay material. To determine changes in properties of overlay mortar, EPMA and SEM analysis were adopted for overlay mortar surrounding the anode material. Test results indicated the following:
