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X-ray Diffraction Examination of the Phases in Expansive Cements

Published online by Cambridge University Press:  06 March 2019

Katharine Mather
Katharine Mather*
Affiliation:
U.S. Army Engineer Waterways Experiment Station Vicksburg, Mississippi 39180
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Abstract

Beginning in December 1968, Type K expansive cements of both the shrinkage-compensating and self-stressing types, particularly ChemStress (a self-stressing cement) have been tested, and examined by X-ray diffraction in the Concrete Laboratory of the U. S. Army Engineer Waterways Experiment Station. They are interesting subjects for the study of mixtures by X-ray diffraction because they may contain as many as 14 identifiable phases, including most of the phases in portland cement. Their examination by X-ray diffraction is greatly assisted by chemical treatments, first with maleic acid in methanol, followed by treatment with ammonium chloride solution to remove the calcium sulfates and leave a residue that consists of tetracalcium trialuminate sulfate, quartz, corundum, and a few very minor substances which have proved to be unidentifiable.

Type
X-Ray Powder Diffraction
Information
Advances in X-Ray Analysis , Volume 20: Twenty-Fifth Annual Conference on Applications of X-ray Analysis, August 4-6, 1976 , 1976 , pp. 41 - 52
Copyright
Copyright © International Centre for Diffraction Data 1976

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References

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