Port facilities are generally located in severe environments.Therefore, their structural performance is often easily degraded owing to material deterioration and corrosion.To keep their performance above the required level, effective and efficient maintenance should be carried out.In this study, focusing on upgrading and optimizing maintenance of port concrete facilities,we tried developing the deterioration judgment method used by electrochemical properties of reinforced concrete (RC) members.The RC specimens, in which corrosion sensors were installed, were exposed to sea water splashing environment.The corrosion sensor can detect the initiation of corrosion and corrosion rate by monitoring half-cell potential and polarization resistance.
Analyzing the 2-year monitoring data, the following concluding remarks can be obtained;the lowest value of Half-cell potential during a measurement term with judgment criteria of ASTM standard can detect the corrosion initiation.Mean value of half-cell potential population can be estimated by the measured half-cell potential values.To evaluate the corrosion initiation accurately, it was necessary to measure both of half-cell potential and polarization resistance.