Steel corrosion on RC structures under sustained service loads - A critical review
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Publication Details
Author list: Malumbela G, Alexander M, Moyo P
Publisher: Elsevier
Place: OXFORD
Publication year: 2009
Journal: Engineering Structures (0141-0296)
Journal acronym: ENG STRUCT
Volume number: 31
Issue number: 11
Start page: 2518
End page: 2525
Number of pages: 8
ISSN: 0141-0296
eISSN: 1873-7323
Languages: English-Great Britain (EN-GB)
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Abstract
This paper reviews previous studies carried out to investigate the effects of simultaneous load and steel corrosion on the rates of corrosion and the behaviour of RC structures. it highlights the need to perform corrosion tests on laboratory specimens whilst they are under a sustained load so as to better understand the behaviour of corroding in-service structures. Furthermore, it provides a critical discussion on loading systems previously used to corrode RC beams under load and key areas that need further research. The review showed that there were contrasting results on the effects of loading on the rate of corrosion and on corrosion crack widths. Corrosion under load was however found to significantly increase deflections of specimens. In addition, and perhaps more importantly, deflections showed that there was never a gain in stiffness during the corrosion process which is often observed at early corrosion stages on structures corroded in the absence of a sustained load. (C) 2009 Elsevier Ltd. All rights reserved.
Keywords
Corrosion rate, Crack widths, Deflections, Mass loss, Stiffness, Sustained load
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