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Inelastic neutron scattering study of the hydration of tricalcium silicate

Published online by Cambridge University Press:  31 January 2011

S. A. FitzGerald ,
D. A. Neumann ,
J. J. Rush ,
R. J. Kirkpatrick ,
X. Cong  and
R. A. Livingston
S. A. FitzGerald
Affiliation:
NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
D. A. Neumann
Affiliation:
NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
J. J. Rush
Affiliation:
NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
R. J. Kirkpatrick
Affiliation:
Department of Geology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
X. Cong
Affiliation:
Department of Geology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
R. A. Livingston
Affiliation:
Exploratory Research Team, Federal Highway Administration, McLean, Virginia 22101
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Abstract

Inelastic neutron scattering is applied for the first time to monitor directly the concentration of calcium hydroxide formed during the hydration of tricalcium silicate. Results taken between 10 and 40 °C show that the onset of calcium hydroxide formation is delayed at lower temperatures but that the final quantity formed appears to be converging to a temperature-independent value. At 20°C, the 28 day value is 1.3 moles per mole of tricalcium silicate. Combining these results with previous measurements of the free water index made using quasielastic neutron scattering reveals that the hydrogen content of the C–S–H gel decreases significantly at increased curing temperature.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 3 , March 1999 , pp. 1160 - 1165
Copyright
Copyright © Materials Research Society 1999

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