Chloride-induced corrosion of steel in cracked concrete – Part I: Experimental studies under accelerated and natural marine environments
Abstract
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 a marine tidal zone. Experimental variables were crack width w{sub cr} (0, incipient crack, 0.4, 0.7 mm), cover c (20, 40 mm), binder type (PC, PC/GGBS, PC/FA) and w/b ratio (0.40, 0.55). Results show that corrosion rate (i{sub corr}) was affected by the experimental variables in the following manner: i{sub corr} increased with increase in crack width, and decreased with increase in concrete quality and cover depth. The results also show that the corrosion performance of concretes in the field under natural corrosion cannot be inferred from its performance in the laboratory under accelerated corrosion. Other factors such as corrosion process should be taken into account.
- Authors:
-
- Department of Civil Engineering, University of Cape Town, Private Bag X3, 7701 Rondebosch (South Africa)
- Publication Date:
- OSTI Identifier:
- 22696545
- Resource Type:
- Journal Article
- Journal Name:
- Cement and Concrete Research
- Additional Journal Information:
- Journal Volume: 79; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; CARBON 20; CONCRETES; CORROSION; CRACKS; DEPTH
Citation Formats
Otieno, M., E-mail: Mike.Otieno@wits.ac.za, Beushausen, H., and Alexander, M. Chloride-induced corrosion of steel in cracked concrete – Part I: Experimental studies under accelerated and natural marine environments. United States: N. p., 2016.
Web. doi:10.1016/J.CEMCONRES.2015.08.009.
Otieno, M., E-mail: Mike.Otieno@wits.ac.za, Beushausen, H., & Alexander, M. Chloride-induced corrosion of steel in cracked concrete – Part I: Experimental studies under accelerated and natural marine environments. United States. https://doi.org/10.1016/J.CEMCONRES.2015.08.009
Otieno, M., E-mail: Mike.Otieno@wits.ac.za, Beushausen, H., and Alexander, M. 2016.
"Chloride-induced corrosion of steel in cracked concrete – Part I: Experimental studies under accelerated and natural marine environments". United States. https://doi.org/10.1016/J.CEMCONRES.2015.08.009.
@article{osti_22696545,
title = {Chloride-induced corrosion of steel in cracked concrete – Part I: Experimental studies under accelerated and natural marine environments},
author = {Otieno, M., E-mail: Mike.Otieno@wits.ac.za and Beushausen, H. and Alexander, M.},
abstractNote = {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 a marine tidal zone. Experimental variables were crack width w{sub cr} (0, incipient crack, 0.4, 0.7 mm), cover c (20, 40 mm), binder type (PC, PC/GGBS, PC/FA) and w/b ratio (0.40, 0.55). Results show that corrosion rate (i{sub corr}) was affected by the experimental variables in the following manner: i{sub corr} increased with increase in crack width, and decreased with increase in concrete quality and cover depth. The results also show that the corrosion performance of concretes in the field under natural corrosion cannot be inferred from its performance in the laboratory under accelerated corrosion. Other factors such as corrosion process should be taken into account.},
doi = {10.1016/J.CEMCONRES.2015.08.009},
url = {https://www.osti.gov/biblio/22696545},
journal = {Cement and Concrete Research},
issn = {0008-8846},
number = ,
volume = 79,
place = {United States},
year = {Fri Jan 15 00:00:00 EST 2016},
month = {Fri Jan 15 00:00:00 EST 2016}
}