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중성화 환경하의 콘크리트 내에서의 Cr강방식철근의 방식성
태성호 ( Tae Bung-ho ),이한승 ( Lee Han-seung ),신성우 ( Shin Sung-woo ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
With the aim of developing Cr-bearing rebars having required resistance to deteriorative environments prone to carbonation, ten types of steel bars having different Cr contents were embedded in concretes to fabricate specimens assuming such deteriorative environments. After being carbonated to the reinforcement level, these concretes were subjected to corrosion-accelerating cycles of heating/cooling and drying/wetting. The time-related changes in the corrosion area ratio and corrosion loss of the Cr-bearing rebars were then measured to investigate their corrosion resistance. The results revealed that the Cr content required for corrosion resistance in a simple carbonating environment was 5% or more. The corrosion-resisting performance of Cr-bearing reinforcement was particularly noticeable with a Cr content of 7% or more.