Stray current induced corrosion of steel fibre reinforced concrete
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Authors
Tang, KangkangIssue Date
2017-08-18
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Stray current induced corrosion is a major technical challenge for modern electric railway systems. The leakage of stray current to surrounding reinforced concrete structures can lead to steel reinforcement corrosion and the subsequent disintegration of concrete. Steel fibre reinforced concrete has been increasingly used as the railway tunnel lining material but it is not clear if discrete steel fibres can still pick up and transfer stray current in the same way as conventional steel reinforcement and lead to similar corrosion reactions. The corrosion behaviour of steel fibres was investigated through voltammetry tests and electrochemical impedance spectroscopy. The presence of high concentration chloride ions was found to increase the pitting corrosion tendency of steel fibres in simulated concrete pore solutions and mortar specimens. The chloride threshold level for corrosion of steel fibres in concrete is approximately 4% NaCl (by mass of cement) which is significantly higher than that of conventional steel reinforcement.Citation
Tang, K., 'Stray current induced corrosion of steel fibre reinforced concrete', Cement and Concrete Research. 100 pp.445 doi: 10.1016/j.cemconres.2017.08.004Publisher
ElsevierJournal
Cement and Concrete ResearchAdditional Links
http://linkinghub.elsevier.com/retrieve/pii/S0008884617303009Type
Journal articleLanguage
enISSN
0008-8846ae974a485f413a2113503eed53cd6c53
10.1016/j.cemconres.2017.08.004
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