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Hydration Reactions and Etrringite Formation in Selected Cementitious Coal Conversion By-Products

Published online by Cambridge University Press:  15 February 2011

Jody K. Solem  and
Gregory J. McCarthy
Jody K. Solem
Affiliation:
Department of Chemistry, North Dakota State University, Fargo, ND 58105 U.S.A.
Gregory J. McCarthy
Affiliation:
Department of Chemistry, North Dakota State University, Fargo, ND 58105 U.S.A.
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Abstract

Cementitious reactions and ettringite formation, which occur when water is added to high-calcium fly ash, to many dry flue gas desulfurization solids, and to two of the residues from the emerging “clean coal” technologies, fluidized bed combustion and limestone injection multiphase burner, have been studied. The parameters varied included water to solid ratio and curing time. Crystalline reactants and products were monitored by X-ray powder diffraction. The amount of ettringite, the principal crystalline cementitious reaction product, was determined after three months of curing. Results are discussed in terms of available Ca, Al and S in each by-product and w/s ratio.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 245: Symposium K – Advanced Cementitious Systems: Mechanisms and Properties , 1991 , 71
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

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