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학술저널
저자정보
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대한건축학회 대한건축학회 논문집 - 구조계 大韓建築學會論文集 構造系 第24卷 第6號
발행연도
2008.6
수록면
93 - 100 (8page)

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This paper discusses a new method for assessing the corrosion rate of reinforcing steel bars in concrete using the DC resistivity technique. Measurements were conducted on the reinforced concrete specimens which were made for this experiment with the different diameter of steel bars, the cover depth and compressive strength of concrete. The traditional Wenner technique (4-probe array system) was used for the concrete resistivity measurements. A DC resistivity measurement device was built for the experiment to apply the DC current perturbation. The true resistivity (p<SUB>t</SUB>) and apparent resistivity (P<SUB>a</SUB>) were measured using the traditional Wenner technique, and DC resistivity (PDC<SUB>-a</SUB>) were also measured using the DC resistivity technique. Using these results, the corrosion rate of reinforcing steel was evaluated and compared with the results measured by the linear polarization resistance method which has been developed to direct measure the corrosion rate of reinforcing steel in concrete structure.
As the results, it was shown that the corrosion rate of reinforcing steel can be evaluated quantitatively using the DC resistivity method and the corrosion rate results were similar to those measured using the linear polarization resistance method. However, it was also shown that the apparent resistivity (P<SUB>a</SUB>) and DC resistivity (PDC<SUB>-a</SUB>) were strongly influenced by the cover depth of concrete, the quality of concrete and the diameter of steel bars. Therefore, the further investigations for the various parameters such as the temperature and moisture contents in concrete are needed to use the DC resistivity method for evaluating the corrosion rate of steel in concrete structures in the field.

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Abstract
1. 서론
2. 콘크리트 전기저항법(concrete resistivity)에 의한 내부 철근의 부식 측정
3. 실험계획 및 방법
4. 실험결과 및 고찰
5. 결론
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