Accelerated Concrete Carbonation and Resulting Rebar Corrosion Under a High Temperature Condition in Nuclear Power Plants

To assess the durability of concrete structures at nuclear power plants in Japan, plant life management technical evaluation is performed accordance with guidelines Architectural Institute Japan for maintenance and facilities. Concrete carbonation one degradation factors covered guidelines, sampling to confirm progression predict future progression. Electricity providers perform locations constituting environments (temperature, relative humidity, carbon dioxide concentration) where progresses relatively fast that has not reached rebars In this study, accelerated tests were high temperature, which believed accelerate carbonation, considering parameters humidity. Progression its impact on rebar corrosion examined. The results showed high-temperature can be predicted a margin safety using Japan’s prediction equation. Moreover, because humidity temperature do correspond each other, are typically unlikely corrode even if rebars, provided they subjected extreme wet-dry cycles.