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In situ quasi-elastic scattering characterization of particle size effects on the hydration of tricalcium silicate

Published online by Cambridge University Press:  01 November 2004

A.J. Allen ,
J.C. McLaughlin ,
D.A. Neumann  and
R.A. Livingston
A.J. Allen*
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
J.C. McLaughlin
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
D.A. Neumann
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
R.A. Livingston
Affiliation:
Office of Infrastructure Research and Development, Federal Highway Administration, McLean, Virginia 22101
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The effects of different particle size distributions on the real-time hydration of tricalcium silicate cement paste were studied in situ by quasi-elastic neutron scattering. The changing state of water in the cement system was followed as a function both of cement hydration time and of temperature for different initial particle size distributions. It was found that the length of the initial, dormant, induction period, together with the kinetics of hydration product nucleation and growth, depends on the hydration temperature but not on the particle size distribution. However, initial particle size does affect the total amount of cement hydrated, with finer particle size producing more hydrated cement. Furthermore, the diffusion-limited rate of hydration at later hydration time is largely determined by the initial tricalcium silicate particle size distribution.

Keywords

CementNeutron scatteringMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 11 , November 2004 , pp. 3242 - 3254
Copyright
Copyright © Materials Research Society 2004

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References

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