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Microstructure of a Slag-Cement Paste Determined by Small-Angle Neutron Scattering

Published online by Cambridge University Press:  10 February 2011

L.P. Aldridge ,
W.K. Bertram ,
T.M. Sabine  and
A Ioffe
L.P. Aldridge
Affiliation:
ANSTO, PMB I Menai, 2234, NSW, Australia
W.K. Bertram
Affiliation:
ANSTO, PMB I Menai, 2234, NSW, Australia
T.M. Sabine
Affiliation:
ANSTO, PMB I Menai, 2234, NSW, Australia
A Ioffe
Affiliation:
BENSC Hahn Meitner Institut Glienicker Str 100, D14109 Berlin, Germany and St Petersburg Nuclear Physics Institute, Gatchina, Leningrad distr., 188350Russia
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Abstract

Small angle neutron scattering from hydrating cement paste was compared to that from a paste made of a blend of cement and ground granulated blast furnace slag. The scattering measurements were used to determine the average size of the scattering particles during hydration. Their rate of growth was monitored in-situ over the first 40 hours of hydration. There was little difference in the scattering spectra, showing that the scattering particles in paste containing slag blend or cement were of similar size. At the beginning of hydration the particle radii were about 250 nn and after 14 days they had grown to over 600nm.

Estimates of particle sizes are critically dependent on the amount of multiple scattering. Therefore the amount of multiple scattering of the sample must be taken into account before making comparisons between the sizes of particles of different matrices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 506: Symposium – Scientific Basis for Nuclear Waste Management XXI , 1997 , 521
Copyright
Copyright © Materials Research Society 1998

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References

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