DETERIORATION OF CONCRETE BRIDGE DECKS FROM CORROSION OF REINFORCING STEEL
DETERIORATION OF CONCRETE BRIDGE DECKS FROM CORROSION OF REINFORCING STEEL
复制标题
钢筋腐蚀引起的混凝土桥面劣化
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
P. Cady
中科院分区：
文献类型：
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作者：
R. Weyers;P. Cady
对22个桥面进行了检查，以确定钢筋腐蚀导致混凝土劣化的程度。目视检查表明，约40%的含有裸露钢筋的桥面处于劣化的初始阶段，但含有环氧树脂涂层钢筋的桥面均未因钢筋腐蚀而劣化。对4个甲板的深入研究显示，含有裸钢的甲板出现了更广泛的劣化，但含有环氧涂层钢的甲板没有劣化。研究还表明，氯离子在混凝土桥面板中的扩散遵循Fick定律，存在一个有效的扩散常数，可用于混凝土桥面板的维修和修复。
Twenty-two bridge decks were examined to determine the extent of deterioration of the concrete resulting from corrosion of the reinforcing steel. Visual inspection indicated that about 40 percent of the decks containing bare reinforcing steel were in the initial stage of deterioration, but none of the decks containing epoxy-coated reinforcing steel were deteriorating because of corrosion of the steel. An in-depth study of 4 of the decks revealed more extensive deterioration of those containing bare steel, but no deterioration in those containing epoxy-coated steel. The in-depth study also indicated that the diffusion of chloride ions through concrete bridge decks obeys Fick's law and an effective diffusion constant exists which can be used for planning maintenance and rehabilitation.