Zhao, H., Hanein, T. orcid.org/0000-0002-3009-703X and Kinoshita, H. (2020) The effect of sodium carbonate on the formation of magnesium silicate hydrate. In: Geddes, D., Ghazizadeh, S., Kearney, S., Koma, G., Le Galliard, C., Provis, J. and Yorkshire, A., (eds.) Book of Abstracts of 74th RILEM Annual Week and the 40th Cement and Concrete Science Conference. 40th Cement and Concrete Science Conference and 74th RILEM Annual Week, 31 Aug - 04 Sep 2020, Online conference. University of Sheffield
Abstract
Practical application of magnesium silicate hydrate (M-S-H) cements is hindered due to their relatively slow setting time and low early strength development. Our previous study showed that the formation of the M-S-H binders can be accelerated by the addition of sodium bicarbonate (NaHCO3). To further understand the effect of carbonate additives on the M-S-H formation, sodium carbonate (Na2CO3) is tested in the title study. Aqueous solutions of Na2CO3 are used at different concentrations to hydrate a mixture of magnesium hydroxide (Mg(OH)2) and microsilica. The products are analysed by X-ray diffraction (XRD) and thermogravimetry (TG) to track the evolution of M-S-H and other phases; ex-situ pH measurements were also carried out. The obtained results indicated limited acceleration of M-S-H formation through addition of Na2CO3. The effects of pH, sodium and carbonate ions concentrations are further discussed.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © 2020 The Authors. |
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: | 08 Jul 2020 07:19 |
Last Modified: | 27 Mar 2024 15:35 |
Status: | Published |
Publisher: | University of Sheffield |
Refereed: | Yes |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:162983 |