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Title |
Development of Maintenance Simulation System and Prediction of Chloride Ion Permeation for Marine Concrete Structures
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Keywords |
염화물 확산계수 ; 표면염화물함량 ; 임계염화물함량 ; 유지보수시점 ; 건습반복 ; 시스템 ; Chloride penetration coefficient ; Surface chloride contents ; Threshold chloride contents ; Maintenance period ; Dry-wet cycling ; System |
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Abstract |
As both laboratory accelerated experiment and field exposure experiment were performed, at recent, the fifth field test at five year exposures was proceeded according to long period experimental plan. Field experiment, for the adoption of the developed evaluation model, which is consisted of the analysis of chloride penetration profile at gate bridges of sea-dike completed 30 years ago was carried out during upgrading the basic evaluation model with analyzing the annual field test data. The surface concentration of chlorides was replaced to the concentration of chloride of inner concrete near the surface chlorides among his research results at basic model. Maage’s suggestion function was accepted too as a diffusion coefficient of chloride after verifying the change of diffusion coefficient by analysis of annual field test data. The comparison of field data with model predictions and the estimation of remaining life time demonstrates that the proposed updated model and maintenance simulation system can be used to predict the chloride penetration profile in the marine tidal zone and appropriate repair period and cost.
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