염소이온의 확산계수와 콘크리트의 기초물성과의 관계 = Relationship between Chloride Diffusivity and the Fundamental Properties of Concrete

다국어 초록 (Multilingual Abstract)

Marine concrete structure is exposed to salt injury and deteriorated by steel corrosion due to chloride ions diffusion. It, therefore, is very important to estimate the chloride diffusivity in concrete. In this paper the compressive strength and permeable pore volume of concrete are measured and the diffusion coefficient and penetration depth of chloride ions in concrete were investigated to estimate the chloride diffusivity efficiently. To correlate these results each other, regression analysis was done. The results showed a good linear relation between chloride diffusivity and the fundamental properties of concrete and the chloride diffusivity of concrete with water-cement ratios of 40%~60% were about 2.5∼6.6×10-12㎡/s.

국문 초록 (Abstract)

해양환경 하에 건설되는 콘크리트구조물은 다양한 염해 환경에 노출되어 있으며, 이중 염소이온의 침투 및 확산으로 인한 콘크리트 중의 철근부식과 화학적 침식 등은 콘크리트구조물의 주요 성능저하 요인으로 지적되고 있다. 따라서 해수 중의 염소이온의 침투 및 확산 메커니즘을 효율적으로 평가하기 위하여 전기화학적 촉진시험으로부터 염소이온의 확산계수를 추정하였다. 또한 콘크리트의 압축강도, 투수공극량 및 염소이온의 침투깊이 등과 염소이온의 확산계수와의 상관관계를 분석하기 위하여 회귀분석을 실시하였다. 본 연구의 시험결과에 의하면, 물-시멘트비 40~60%의 범위에서 보통콘크리트의 염소이온 확산계수는 2.5∼6.6×10-12㎡/s 정도였으며, 염소이온의 확산계수와 콘크리트의 물성과의 상관관계는 선형의 상관관계가 있었다.

참고문헌 (Reference)

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