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When sections of port structures in water (such as piers) are steel structures such as steel pipe piles, it is common to apply cathodic protection to the steel pipe piles using a galvanic anode system.... However, rebars during the construction of the upper part of the pier are electrically conducted with the steel pipe piles in the sea. If the upper construction concrete sinks into the sea, protective current from the galvanic anode in the sea flows into the rebars in the concrete. Moreover, during construction on the upper part of the pier during the tidal zone, if cathodic protection is applied using an impressed current system, the wetting situation within the same parts will differ and the distribution of the protective current will become uneven. In this study, we installed a long RC specimen in a tidal environment, imitating a part of a peer, to grasp the potential and protective current distribution for cases of conductance from the electrodes in the upper section construction, conductance from the galvanic anodes in the lower construction section and conductance from both the upper and lower section construction. Moreover, by evaluating the corrosion status of the rebars in the concrete, we examined the effects of cathodic protection. Based on these results, we can see that, in this test, while conducting to the lower section construction through the galvanic anodes, even when the application of cathodic protection to the upper section construction was HWL or above, there were prevention effect in the steel materials within the concrete near the tidal zone.続きを見る
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Mendeley出力
