Effect of grain size on the vapour phase hydration of monoclinic and triclinic modifications of tricalcium silicate; role of high temperature activation

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Title:Effect of grain size on the vapour phase hydration of monoclinic and triclinic modifications of tricalcium silicate; role of high temperature activation
Creators:
Hanafi, S.
El-Shafei, G. M. S.
Abd El-Hamid, B.
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 56, 10, pp. 1993-2008

Abstract

The hydration of tricalcium silicate (C<sub>3</sub>S) with three grain sizes of monoclinic (M) and triclinic (T) modifications and on their thermally activated samples were investigated by exposure to water vapour at 80°C for 60 days. The products were investigated by XRD, TG and N<sub>2</sub> adsorption. The smaller the particle size the greater was the hydration for both dried and activated samples from (M). In the activated samples a hydrate with 2θ values of 38.4°, 44.6° and 48.6° could be identified. Hydration increased with particle size for the unactivated (T) samples but after activation the intermediate size exhibited enhanced hydration. Thermal treatment at 950°C of (T) samples increased the surface active centers on the expense of those in the bulk. Changes produced in surface texture upon activation and/or hydration are discussed.

Title:Effect of grain size on the vapour phase hydration of monoclinic and triclinic modifications of tricalcium silicate; role of high temperature activation
Creators:
Hanafi, S.
El-Shafei, G. M. S.
Abd El-Hamid, B.
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:56
Number:10
Page Range:pp. 1993-2008
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19911993UNSPECIFIED
ID Code:5129
Item Type:Article
Deposited On:22 Feb 2010 11:31
Last Modified:22 Feb 2010 10:31

Citation

Hanafi, S.; El-Shafei, G. M. S.; Abd El-Hamid, B. (1991) Effect of grain size on the vapour phase hydration of monoclinic and triclinic modifications of tricalcium silicate; role of high temperature activation. Collection of Czechoslovak Chemical Communications, 56 (10). pp. 1993-2008. ISSN 0010-0765

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