van Deventer, J.S.J., San Nicolas, R., Ismail, I. et al. (3 more authors) (2014) Microstructure and durability of alkali-activated materials as key parameters for standardization. Journal of Sustainable Cement-Based Materials, 4 (2). pp. 116-128. ISSN 2165-0373
Abstract
Alkali-activated concrete (AAC) has been commercialized as a low-CO2 construction material, but its adoption still faces several challenges, including standardization, lack of a dedicated supply chain, limited service track record, and the question of whether laboratory durability testing can predict service life. This paper outlines how using different precursors leads to the formation of different AAC phase assemblages, and how AAC can be recognized in standards using a performance-based approach independent of binder chemistry. Microstructural assessment of pastes, strength development, water permeability, and chloride migration of two AACs (100% slag and 1:1 slag:fly ash) are presented, and compared to Portland cement concrete. Manipulation of binder chemistry leads to differences in the properties of the AACs; however, both AACs assessed exhibited technical benefits in a performance-based comparison. AACs can meet the requirements of the equivalent performance concept, independent of the binder chemistry, supporting their scale-up, regulatory acceptance, and wider adoption.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 Taylor & Francis. This is an author produced version of a paper subsequently published in Journal of Sustainable Cement-Based Materials. Uploaded in accordance with the publisher's self-archiving policy. This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sustainable Cement-Based Materials on 12 November 2014, available online: http://wwww.tandfonline.com/10.1080/21650373.2014.979265 |
Keywords: | alkali-activated concrete; blast furnace slag; fly ash; microstructure; durability; commercialization |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 12 Oct 2015 15:22 |
Last Modified: | 12 Apr 2017 05:25 |
Published Version: | https://doi.org/10.1080/21650373.2014.979265 |
Status: | Published |
Publisher: | Taylor & Francis |
Refereed: | Yes |
Identification Number: | 10.1080/21650373.2014.979265 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:86434 |