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Investigation of Portland Cement and Pure C3S Using 1-D Sans

Published online by Cambridge University Press:  22 February 2011

R. Berliner ,
B. J. Heuser  and
M. Popovici
R. Berliner
Affiliation:
University of Missouri, Research Reactor Center, Columbia, MO 65211
B. J. Heuser
Affiliation:
University of Illinois at Urbana-Champaign, Dept. of Nuclear Engineering, Urbana, IL 61801
M. Popovici
Affiliation:
University of Missouri, Research Reactor Center, Columbia, MO 65211
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Abstract

The effect of contrast matching in ordinary Portland cement (OPC) and pure C3S has been investigated as a function of time after hydration using the 1-D small-angle scattering technique. The observed scattering response of OPC hydrated with 100% D2O increased in time, while the response of OPC hydrated with a null water mixture did not. The increase in scattering is therefore attributed to the formation of bubbles in the water-filled pores of the hydrating cement paste. The addition of 1% CaCl2 to OPC increased the kinetics of bubble formation considerably. Based on similar contrast measurements, we have concluded that bubbles do not form in pure C3S. However, the addition of 1% CaCl2 was found to induce bubble formation in the hydrated C3S compound.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 481
Copyright
Copyright © Materials Research Society 1995

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References

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