Bernal, S.A., Provis, J.L. orcid.org/0000-0003-3372-8922, Mejia de Gutierrez, R. et al. (1 more author) (2015) Accelerated carbonation testing of alkali-activated slag/metakaolin blended concretes: effect of exposure conditions. Materials and Structures, 48 (3). pp. 653-669. ISSN 1359-5997
Abstract
This paper addresses the effects of relative humidity (RH) and carbon dioxide (CO2) concentration on the rate and effects of accelerated carbonation in alkali-activated slag/metakaolin (MK) concretes. Strength and water absorption are used alongside phenolphthalein measurements to monitor carbonation, and the effects of drying at different RHs are particularly significant in controlling carbonation rates. Different trends in the carbonation rate as a function of MK content are observed when varying the CO2 concentration, further revealing that the carbonation rates of these materials under accelerated conditions are influenced strongly by the testing protocol. The standard phenolphthalein method for testing carbonation depth appears only to be capturing the change in alkalinity with pore solution carbonation, meaning that it does not correlate well with other performance parameters at high CO2 concentrations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 Springer. This is an author produced version of a paper subsequently published in Materials and Structures. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Alkali-activated cement; Concrete; Granulated blast-furnace slag; Carbonation; Durability |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Funding Information: | Funder Grant number EUROPEAN RESEARCH COUNCIL GeopolyConc - 335928 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 08 Apr 2016 14:41 |
Last Modified: | 11 Apr 2016 02:19 |
Published Version: | https://dx.doi.org/10.1617/s11527-014-0289-4 |
Status: | Published |
Publisher: | Springer Verlag |
Refereed: | Yes |
Identification Number: | 10.1617/s11527-014-0289-4 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:97159 |