Krishnan, S orcid.org/0000-0002-9088-0384, Zunino, F, Bishnoi, S et al. (1 more author) (2023) Characterisation and hydration kinetics of β-C2S synthesised with K2SO4 as dopant. Cement and Concrete Research, 167. 107119. p. 107119. ISSN 0008-8846
Abstract
In this study, a protocol for synthesising β-C2S using K2SO4 as a dopant has been reported. Quantitative X-Ray diffraction was used to characterise synthesised samples. It was observed that it is possible to synthesise β-C2S with high purity (>96 wt%) and limit the formation of free lime to below 0.5 wt% using this protocol. Unreactive γ-C2S was the main secondary phase present in the sintered samples. Isothermal calorimetry studies were conducted to understand the reaction kinetics which showed that β-C2S reacts slowly but produces similar calorimetric curve profiles as that of C3S. The C-S-H formed from the hydration of C2S was observed to be morphologically and compositionally identical to the C-S-H produced from the hydration of C3S. The hydration kinetics of β-C2S was seen to be affected by the presence of aluminosilicate pozzolan, such as calcined clay, which can have practical implications while producing blended cements with belitic clinkers.
Metadata
Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Belite; Alumina; Clinker; C-S-H; Calorimetry |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Mar 2023 09:29 |
Last Modified: | 09 Mar 2023 14:48 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | https://doi.org/10.1016/j.cemconres.2023.107119 |