Bondar, D, Nanukuttan, SV, Soutsos, MN et al. (2 more authors) (2017) Suitability of alkali activated ggbs/fly ash concrete for chloride environments. In: ACI Special Publications. 10th ACI/RILEM International Conference on Cementitious Materials and Alternative Binders for Sustainable Concrete, 02-04 Oct 2017, Montreal, Canada. American Concrete Institute , 35.1-35.14.
Abstract
This study investigates chloride ingress into alkali-activated slag/fly ash (AA-S/F) concretes with various ratios of slag to fly ash (80/20, 60/40,40/60 and 20/80). Alkaline activators were a mixture of sodium hydroxide and sodium silicate to obtain between 6-8% sodium hydroxide (NaOH) concentration by weight of cementitious material. The Si0₂/Na₂0 ratios (silica modulus, Ms) of mixtures were 0.45, 1.0 and 1.25. Tests applied included typical fresh and hardened properties, air content, slump, compressive strength, bulk resistivity and non-steady state chloride migration. The results show that while attractive engineering properties can be achieved, the chloride ingress in the AA-S/F concretes studied here with > 20% fly ash is moderate to high and this may make them unsuitable for use in reinforced concrete in chloride environments.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2017, American Concrete Institute. All rights reserved. This is an author produced version of a paper published in ACI Special Publications. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | alkali activated slag/fly ash concretes, bulk resistivity, chloride migration coefficient, compressive strength, workability |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) > Institute for Resilient Infrastructure (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 Apr 2018 14:40 |
Last Modified: | 25 Jun 2023 21:19 |
Published Version: | https://www.concrete.org/publications/internationa... |
Status: | Published |
Publisher: | American Concrete Institute |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:129929 |