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Influence of curing temperature on cement paste microstructure measured by 1H NMR relaxometry

Gajewicz-Jaromin, Agata, McDonald, Peter J., Muller, Arnaud C.A. and Scrivener, Karen L. (2019) Influence of curing temperature on cement paste microstructure measured by 1H NMR relaxometry Cement and Concrete Research, 122. pp. 147-156.

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1H nuclear magnetic resonance (NMR) relaxometry, supported by X-Ray diffraction and thermogravimetric analysis, has been used to characterise microstructure of white cement pastes underwater cured at temperatures in the range 10°C to 60°C. As the temperature increases, so the C-S-H, capillary pore water and interhydrate pore water content all increase; the ettringite and gel pore water content decrease; and the Portlandite content stays constant. A non-linear increase in the C-S-H ‘solid’ and ‘bulk’ densities, that exclude and include gel pore water respectively, has been observed with the increase of temperature. This is accompanied by a decrease in C-S-H water content but no change in the Ca/(Si + Al) ratio. The increase in the C-S-H ‘solid’ density has been attributed to a decrease in the number of locally stacked C-S-H layers. The increase in the C-S-H ‘bulk’ density is additionally attributed to the decrease in the gel porosity.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
McDonald, Peter
Muller, Arnaud C.A.
Scrivener, Karen L.
Date : August 2019
Funders : European Union Seventh Framework Programme
DOI : 10.1016/j.cemconres.2019.05.002
Copyright Disclaimer : © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Depositing User : Clive Harris
Date Deposited : 03 Jun 2019 13:13
Last Modified : 15 Nov 2019 15:53

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