Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 61, Issue -, Pages 79-89Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2014.03.015
Keywords
Geopolymer; Concrete; Fly ash; Carbonation; Corrosion
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Funding
- University of Sheffield
- European Research Council under the European Union/ERC [335928]
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Reinforced geopolymer concretes prepared using three fly ashes of varying Ca content were subjected to accelerated carbonation for a period of 450 days. Changes induced in the concretes were determined after exposure to a 5% CO2 atmosphere, and electrochemical measurements were performed over the time of testing to evaluate the effects of carbonation on the corrosion process of the steel rebars. This study indicates that geopolymer concretes prepared with fly ashes having reduced calcium content are more suitable for the production of durable concrete for structural applications under exposure to carbonating environments, as the properties of these materials seem to mitigate the risk of carbonation-induced reinforcement corrosion in concrete. (C) 2014 Elsevier Ltd. All rights reserved.
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