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Visual observation, chloride ingress, porosity, and corrosion of steel bars in RC beam made with seawater and tap water were investigated in this paper based on 36 years of exposure under marine tidal... environment. After long-term exposure, seawater mixing shows better performance against corrosion of steel bar as well as strength, concrete resistance, oxygen permeability and microstructure compared with tap water mixing. It shows high possibility to use seawater as mixing water with precautions, such as minimum 50mm in cover depth which has influence significantly for the service life of RC structure.続きを見る
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