Ren, Z. orcid.org/0000-0003-1851-677X, Georget, F., Provis, J. et al. (3 more authors) (2023) Effect of cooling rates on the properties of Portland cement clinkers in the presence of Mg. In: Thailand Concrete Association, (ed.) Further Reduction of CO2 -Emissions and Circularity in the Cement and Concrete Industry. 16th International Congress on the Chemistry of Cement 2023 (ICCC2023), 18-22 Sep 2023, Bangkok, Thailand. International Congress on the Chemistry of Cement (ICCC) , pp. 86-89.
Abstract
In order to enhance the performance of Portland cement clinker, this study investigates the effect of cooling rates on the mineralogical composition of cement clinkers containing magnesium (Mg), which is the most common minor element in raw materials (e.g., limestone). Three cooling regimes were considered to simulate industrial kiln processing conditions. MgO contents of 0, 3, and 6 wt.% were considered in this study. After synthesis of the clinkers, quantitative X-ray diffraction is used to investigate the mineralogical composition, as well, the phase amounts using the Rietveld method. The results show that rapid cooling and Mg doping can promote the formation of alite, and monoclinic alite can be stabilized via Mg ions. Slow cooling and Mg incorporation can stabilize g- C2S, but a rapid cooling rate is still effective to restrain the transformation from b-C2S to g-C2S in MgO-doped clinker. The cooling rates do not influence the content of ferrite and C3A obviously, but the MgO incorporation can enhance the ferrite formation and reduce the C3A content. At a slow cooling rate, little Mg can dissolve in clinker phases, but the retention of MgO in clinker phases can be increased by a fast cooling rate. Therefore, the effect of MgO on the mineralization and the solubility of MgO is a function of cooling rates.
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: | © 2023 International Congress on the Chemistry of Cement (ICCC). All papers in the 2023 conference proceedings are published under the license CC-BY-ND 4.0. (https://creativecommons.org/licenses/by-nd/4.0/legalcode) |
Keywords: | Portland cement; clinker, magnesium; cooling rate |
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: | 01 Nov 2023 17:06 |
Last Modified: | 01 Nov 2023 17:09 |
Published Version: | https://www.iccc-online.org/archive/ |
Status: | Published |
Publisher: | International Congress on the Chemistry of Cement (ICCC) |
Refereed: | Yes |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:204795 |