Bernal, S.A., Rodríguez, E.D., Mejia de Gutiérrez, R. et al. (1 more author) (2015) Performance at high temperature of alkali-activated slag pastes produced with silica fume and rice husk ash based activators. Materiales de Construccion, 65 (318). e049. ISSN 0465-2746
Abstract
© 2015 CSIC. This study assessed the mechanical properties, and structural changes induced by high temperature exposure, of alkali-silicate activated slag cements produced with sodium silicates derived from silica fume (SF) and rice husk ash (RHA). Similar reaction products were identified, independent of the type of silicate used, but with subtle differences in the composition of the C-S-H gels, leading to different strength losses after elevated temperature exposure. Cements produced with the alternative activators developed higher compressive strengths than those produced with commercial silicate. All samples retained strengths of more than 50 MPa after exposure to 600 °C, however, after exposure to 800 °C only the specimens produced with the RHA-based activator retained measurable strength. This study elucidated that silicate-activated slag binders, either activated with commercial silicate solutions or with sodium silicates based on SF or RHA, are stable up to 600 °C.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 CSIC. This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial (by-nc) Spain 3.0 License. |
Keywords: | Alkali-activated cements; Blast furnace slag; Temperature; Physical properties; Characterisation |
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: | 05 Oct 2015 14:49 |
Last Modified: | 05 Oct 2015 14:49 |
Published Version: | http://dx.doi.org/10.3989/mc.2015.03114 |
Status: | Published |
Publisher: | CSIC |
Refereed: | Yes |
Identification Number: | 10.3989/mc.2015.03114 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:86839 |