Nondestructive Exploratory Tests of Corrosion of Steels Embedded in Cement-paste and Mortar by the Use of γ-ray
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Nondestructive exploratory test of corrosion of steels embedded in cement paste and mortar was carried out by the method based on γ-ray back-scattering. The possibility of such test was investigated with the theoretical calculation. From these results of the test, the difference (ΔD) of back-scattering dose rate of corroded and uncorroded specimens of bare-steels or cement paste- and mortar-embedded-steels was found and increased with angle (ω) of Compton scattering. A relationship between ΔD and ω was observed. The relation of ΔD with ω by the test corresponded to that by the theoretical calculation. For the steels embedded in cement paste and mortar, the value of ΔD decreased and became irregular depending upon i) the thickness and component of cover and ii) the shape of steel. The subject in future will be the investigation for a method of the exploratory test by γ-ray back-scattering by consideration of above environmental conditions.
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社団法人 腐食防食協会 | 論文
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