Basheer, PAM orcid.org/0000-0002-0835-8029, Ma, Q, Nanukuttan, SV et al. (2 more authors) (2014) Chloride ingress through alkali activated slag concretes. In: Proceedings of the Civil Engineering Research in Ireland Conference. Civil Engineering Research in Ireland 2014 (CERI 2014), 28-29 Aug 2014, Belfast, Northern Ireland. Civil Engineering Research Association of Ireland , pp. 149-154.
Abstract
Alkali activated slag (AAS) is a credible alternative to Portland cement (PC) based binder systems. The superior strength gain and low embodied carbon make it a potential binder for next generation concretes. However there is little known about the long term durability of AAS systems, especially the chloride transport and subsequent corrosion of reinforcing steel. In this study, chloride transport through 12 AAS concretes with different alkali concentrations (Na2O% of mass of slag) and different modulus (Ms) of sodium silicate solution activator was investigated. A non-steady state chloride diffusion test was used for this study due to its similarity to the real exposure environment in terms of chloride transport through concrete. The results showed that the chloride concentration at the surface (Cs) of AAS concretes was higher than that for PC concrete. However, lower non-steady state chloride diffusion coefficient (Dnssd) was obtained for the AAS concretes. The Dnssd of the AAS concretes decreased with the increase of Na2O% and Ms of 1.50 gave the lowest Dnssd. The results are encouraging and it can be concluded that AAS concrete offers a superior performance in terms of chloride transport.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | AAS; chloride diffusion; anionic exchange; pore structure; chloride binding |
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: | 26 Jun 2018 13:18 |
Last Modified: | 16 Aug 2018 08:28 |
Published Version: | http://2014.cerai.net/ |
Status: | Published |
Publisher: | Civil Engineering Research Association of Ireland |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:118209 |