某滨海工业建筑钢筋腐蚀现象与原因分析

Phenomenon and Reasons Analysis of Reinforcement Corrosion of Industrial Building at Coastal Environment

某滨海工业建筑建成投入使用15年以后,临海泵房以及部分厂房出现混凝土开裂以及钢筋腐蚀现象。经现场结构检测与环境分析,发现混凝土保护层的施工质量及偏差是引起目前钢筋腐蚀的主要原因。但由于结构设计中对滨海氯离子环境作用考虑不足,混凝土保护层设计厚度偏低,将来可能引起钢筋大面积腐蚀,进而使该钢筋混凝土结构安全性失效。

In this article, concrete cracks and reinforeement corrosion emerge in pumping room and workshop of one coastal industry building after fifteen years using. According to field structural testing and environmental analysis, the main factor, which causes reinforcement corrosion, is due to construction quality of concrete protection layer. Because the engineer takes less consideration on chloride ion under coastal environment, the steel bar will be corroded widely as the thickness of concrete protection layer is less than the design value. As a result, the safety of reinforcement concrete structure is reduced.