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Title |
Steel Probing in Concrete Using Steel Corrosion Surface Measurement Method Modeling
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Authors |
임홍철 ; 마향화 ; 이석용 ; 이근우 ; 오진원 |
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Keywords |
표면측정법 ; 철근부식 ; 모델링 ; 철근직경 ; 매입깊이 surface measurement method ; corrosion ; modeling ; steel bar size ; cover thickness |
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Abstract |
Using non-invasive surface measurement method, the corrosion state of steel embedded inside concrete can be measured by placing four electrodes on the surface of concrete. Modeling of such measurements can provide valuable information as how interfacial impedance between corroded steel and surrounding concrete results in measured impedance on the concrete surface. In this paper, the modeling of surface measurement technique is used for the determination of the sensitivity of the measurements with respect to steel bar size embedded inside concrete and cover thickness. Modeling results indicated that steel bar sizes varied from D10 to D35 could be identified. Concrete cover thickness changes from 0.02 m to 0.1 m was also distinguished using the modeling scheme. The results confirm this modeling technique is capable of determining steel bar sizes and cover thickness, as well as simulating corrosion responses.
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