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임종순(Lim Jong-Sun),조국환(Cho Kook-Hwan),황선근(Hwang Seon-Keun),전준창(Jeon Jun-Chang) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
Concrete has been most widely used in the construction field and it sustains long life serviceability with its high durability. These days, construction of the near-seashore structures becomes more common and those near-seashore structures are exposed to very severe environmental conditions. Chloride, de-icing salt, carbonation, freezing-thawing and sulfate are main reasons of the deterioration of the concrete structures. Amongst these, the corrosion of the reinforcing bar due to the chloride attack has been known as the primary factor for the deterioration of the concrete structures. In this paper, the chloride diffusion analysis has been carried out in accordance with the Korean Railway Design Code in order to assess durability of a railway structure exposed to the marine environments. Parameters included in the analysis are cement types, water-to-cement ratio, chloride content on the surface, and initial chloride content of the concrete. The required cover depth of the structure was evaluated considering the targeted service life. Based on the analysis results, suggested were the required concrete quality and durability design scheme under the marine environments.