Tajuelo Rodriguez, E, Richardson, IG, Black, L et al. (3 more authors) (2015) Composition, silicate anion structure and morphology of calcium silicate hydrates (C-S-H) synthesized by silica-lime reaction and by the controlled hydration of tricalcium silicate (C3S). Advances in Applied Ceramics, 114 (7). pp. 362-371. ISSN 1743-6753
Abstract
The main product of Portland cement hydration is C-S-H. Despite constituting more than half of the volume of hydrated pastes and having an important role in strength development, very little is known about the factors that determine its morphology. To investigate the relationship between the chemical composition, silicate anion structure and morphology of C-S-H, samples were synthesized via silica-lime reactions and by the hydration of C3S under controlled lime concentrations and with/ without accelerators. The silicate anion structure of the samples was studied by 29Si MAS NMR and the morphology and chemical composition by TEM and SEM. All samples prepared via silica-lime reactions with bulk Ca/Si up to 1.5 were foil-like. The hydration of C3S at fixed lime concentration yielded foil-like C-S-H for [CaO]<22mmol/L and fibrillar C-S-H for [CaO]>22mmol/L. A relationship between the silicate anion structure and the morphology of C-S-H was found for the samples fabricated with accelerators.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Author(s). Published by Taylor & Francis. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/Licenses/by/4.0/),which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Keywords: | C-S-H; C3S Hydration; Morphology; TEM-EDX; Portland cement; 29Si MAS NMR |
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) > Institute for Resilient Infrastructure (Leeds) |
Funding Information: | Funder Grant number EU - European Union 264448 EU - European Union 264448 EU - European Union 264448 EU - European Union 264448 EU - European Union 264448 |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Aug 2015 12:28 |
Last Modified: | 22 Feb 2019 09:52 |
Published Version: | http://dx.doi.org/10.1179/1743676115Y.0000000038 |
Status: | Published |
Publisher: | Maney Publishing |
Identification Number: | 10.1179/1743676115Y.0000000038 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:89187 |