EFFECTS OF THE MOISTURE CONDITION OF CARBONATED CONCRETE ON REINFORCEMENT CORROSION

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  • 中性化したコンクリートの含水状態が鉄筋腐食に及ぼす影響
  • チュウセイカ シタ コンクリート ノ ガンスイ ジョウタイ ガ テッキン フショク ニ オヨボス エイキョウ

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Moisture conditions of concrete are a critical factor in the corrosion of reinforcement. In this study, various electrochemical measurements were conducted using reinforcement in concretes adjusted to various moisture contents to evaluate the corrosion tendencies of reinforcement, thereby investigating the effect of the moisture conditions of concrete deteriorated by carbonation and chloride ions on reinforcement corrosion. In the range of this study, the following were found; In the presence of chloride ions at 5.0kg/m^3, the corrosion rate of reinforcement with a relative moisture content between 20 and 50% rapidly increases as the moisture content of concrete increases. On the other hand, with a relative moisture content of 50% or more, while the increased moisture content accelerates anodic reaction rate, the corrosion rate tends to be suppressed by the reductions in the cathodic reaction rate.

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