Ren, Z., Georget, F., Provis, J.L. et al. (3 more authors) (2023) Thermochemistry of kaolinite dehydroxylation to “metakaolin”. In: 41st Cement & Concrete Science Conference. 41st Cement & Concrete Science Conference, 12-13 Sep 2022, University of Leeds, UK. Institute of Materials, Minerals and Mining , pp. 1-3.
Abstract
Metakaolin is an important pozzolanic material in the construction industry. It is produced from the dehydroxylation of kaolinite at high temperatures (550 - 750 °C) [1]. “Metakaolin” is not uniquely defined and the degree of dehydroxylation (and mass/water loss) is a function of temperature and time. In order to optimise the production process of metakaolin and calcined clays, it is important to quantify the reaction enthalpy changes during dehydroxylation. In this work, a drop calorimeter is used to understand the energetics of kaolinite calcination at 550°C, which is at the lower end of the temperature range that causes the release of the hydroxyl groups from kaolinite [1]. The work is complemented by tracking water loss via dehydroxylation using thermogravimetric analysis (TGA).
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022. |
Keywords: | Metakaolin; Kaolinite; Enthalpy |
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) |
Funding Information: | Funder Grant number Global Cement and Concrete Research Group n/a UK Research & Innovation MR/V023829/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 16 Sep 2022 11:33 |
Last Modified: | 08 Dec 2023 09:28 |
Status: | Published |
Publisher: | Institute of Materials, Minerals and Mining |
Refereed: | Yes |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:190760 |