Repair of Chloride deterioratron of Concrete Structures by Electro-Chemical Chloride removal

本研究探讨海水淡化对钢筋混凝土梁承载力之影响。主要研究结果如下：（1）混凝土中氯离子含量为8.0kg/m^3的混凝土，按受弯破坏模式设计，配以抗剪钢筋的混凝土梁，经过8周的脱盐处理后，其抗弯承载力没有受到影响，但最大荷载下的挠度有所增大。(2)经过8周脱盐处理后，设计为剪切破坏而不加抗剪钢筋的梁的强度和挠度显著提高。这可能是由于海水淡化导致混凝土与钢筋之间的粘结强度下降，从而引发了理想的潮拱机制。(3)具有缠绕拼接的梁在八周的脱盐应用中显示出强度降低。

In this study, influence of desalination on load carrying behavior of reinforced concrete beam was investigated. Main results obtained from this study are as follows :(1) Flexural load bearing capacity of the beam, which was designed to fail in flexural mode with shear reinforcement arranged and the concrete of which included chloride ion 8.0kg/m^3 did not affected by eight weeks desalination treatment, although deflection at maximum load was enlarged.(2) Strength and deflection of the beam which was designed to fail in shear failure without shear reinforcement significantly increased by eight weeks desalination treatment. This may be caused by degradation of bond strength between concrete and steel bar due to desalination and consequently ideal tide arch mechanism was initiated.(3) The beam with wrap splice showed decrease in strength with eight weeks desalination application.