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A platform for research: civil engineering, architecture and urbanism
Epoxy-coated bars as corrosion control in cracked reinforced concrete
One of the most common corrosion protection methods in reinforcing concrete bars is the application of fusion-bonded epoxy coatings. Although considerable research has been carried out on the performance of ECR (epoxy-coated bars), there are still many uncertainties about their performance in cracked concrete. In this experimental program, reinforcing steel bars with six types of epoxy coatings embedded in concrete slabs with a 0.4 mm wide preformed crack intersecting the reinforcing steel at right angles were tested. Results of corrosion potentials, corrosion current density, coating adhesion tests, chloride content, and visual examination after 68 months of exposure to a simulated marine environment are reported. Results revealed that under the studied conditions the ECR did not provide total protection of steel reinforcement in cracked concrete. Their use however, tended to reduce significantly the damage caused by the chloride-induced corrosion when compared with the uncoated bars embedded in concrete with similar characteristics.
Epoxy-coated bars as corrosion control in cracked reinforced concrete
One of the most common corrosion protection methods in reinforcing concrete bars is the application of fusion-bonded epoxy coatings. Although considerable research has been carried out on the performance of ECR (epoxy-coated bars), there are still many uncertainties about their performance in cracked concrete. In this experimental program, reinforcing steel bars with six types of epoxy coatings embedded in concrete slabs with a 0.4 mm wide preformed crack intersecting the reinforcing steel at right angles were tested. Results of corrosion potentials, corrosion current density, coating adhesion tests, chloride content, and visual examination after 68 months of exposure to a simulated marine environment are reported. Results revealed that under the studied conditions the ECR did not provide total protection of steel reinforcement in cracked concrete. Their use however, tended to reduce significantly the damage caused by the chloride-induced corrosion when compared with the uncoated bars embedded in concrete with similar characteristics.
Epoxy-coated bars as corrosion control in cracked reinforced concrete
Lopez-Calvo, H.Z. (author) / Montes-Garcia, P. (author) / Kondratova, I. (author) / Bremner, T.W. (author) / Thomas, M.D.A. (author)
Materials and Corrosion ; 64 ; 599-608
2013
10 Seiten, 8 Bilder, 5 Tabellen, 34 Quellen
Article (Journal)
English
Epoxy-coated bars as corrosion control in cracked reinforced concrete
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