Chloride-induced corrosion of steel in cracked concrete—Part II: Corrosion rate prediction models
- Department of Civil Engineering, University of Cape Town, Private Bag X3, 7701 Rondebosch (South Africa)
Chloride-induced corrosion rate (i{sub corr}) prediction models for RC structures in the marine tidal zone that incorporate the influence of crack width (w{sub cr}), cover (c) and concrete quality are proposed. Parallel corrosion experiments were carried out for 2¼ years by exposing one half of 210 beam specimens (120 × 130 × 375 mm long) to accelerated laboratory corrosion (cyclic wetting and drying) while the other half underwent natural corrosion in the tidal zone. Experimental variables were w{sub cr} (0, incipient crack, 0.4, 0.7 mm), c (20, 40 mm), binder type (PC, PC/GGBS, PC/FA) and w/b ratio (0.40, 0.55). The two proposed models (one each for accelerated and natural i{sub corr}) can aid not only in quantifying the propagation phase, but also provide a novel way to select c, w{sub cr} and concrete quality.
- OSTI ID:
- 22696546
- Journal Information:
- Cement and Concrete Research, Vol. 79; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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