ABSTRACT
Carbonation curing concrete has been developed to reduce carbon dioxide emissions. However, there is much concern about the corrosion of steel inside the concrete caused by the decline in pH causing from CO2 absorption. In this study, the chloride threshold value of a stainless steel bar was evaluated using an immersion test at pH 7.5 and pH 12.5, and this value was found in the order: SUS316>SUS304>SUS410. Next, the stainless steel bar embedded in carbonation curing concrete was exposed to a chloride acceleration environment. The results show that the anti-chloride attack was high at SUS304 and SUS316 in comparison with SUS410. Finally, it was evident that the chloride ion was difficult to fix and it diffused in carbonation curing concrete. Based on this, the corrosion occurrence time of a stainless steel bar was predicted.
