Abstract
Imitating reinforced concrete structures received external chloride induced damage located in the coastal area, the exposure test has been carried out for several years. The specimens have been exposed to 10% aqueous solution of sodium chloride on their upper surface. Two kinds of cure conditions are performed to the specimens. The test data have shown that the corrosion rate of reinforcement is increased with the content of chloride ions and the temperature. They also have shown that the corrosion rate is dependent on the quality of concrete. Based on the test data, we have carried out neural network analyses and constructed the equation to evaluate corrosion rate from apparent chloride diffusion coefficient, chloride contents close to reinforcement, and temperature. We applied the equation to upper structures of actual piers. The simulation results coincided with the actual data.
