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Chloride Penetration into Concrete in Tidal Zone by Diffusion-Convection Analysis  

Kim, Ki-Hyun (서울대학교 에너지자원신기술연구소)
Cha, Soo-Won (울산대학교 건설환경공학부)
Jung, Hyung-Mok (삼성물산 건설부문 토목사업본부 함양-성산간 고속도로 현장소)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.22, no.6, 2009 , pp. 607-615 More about this Journal
Abstract
Analysis of chloride penetration into concrete is performed considering the repeated wetting and drying conditions of tidal zone, by means of the developed finite element program which enables the diffusion-convection analysis to be conducted. Heat conduction and moisture diffusion are also included in the finite element analysis program in order that their effects to chloride penetration may be considered. For the efficiency of calculation, the analyses of temperature, relative humidity and free chloride concentration are conducted successively in that order, by treating the convection of chloride due to moisture diffusion as an source or sink term. By comparing the analysis result from finite element analysis, where main variable is a wetting and drying period, with the chloride profiles from ACI Life-365 method, it is shown that the Life-365 method gives an accurate result for the submerged zone but does not consider the differences of wetting and drying period. To obtain an accurate chloride profile in the tidal zone, it is confirmed that the diffusion-convection finite element analysis should be applied.
Keywords
chloride penetration; diffusion; convection; tidal zone; wetting and drying conditions;
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Times Cited By KSCI : 1  (Citation Analysis)
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