Synthetic calcium aluminosilicate monolith: I. Specific features of the synthesis

A three-step method is suggested for monolith synthesis from fly ash (large-scale waste from the combustion of pulverized coal at heat and power plants), limestone, and sand, which includes filtration com-bustion with superadiabatic heating, fine grinding, and pressing. X-ray diffraction data for th...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2010, Vol.55 (6), p.857-865
Main Authors: Chervonnyi, A. D, Chervonnaya, N. A
Format: Article
Language:English
Subjects:
Binders
Chemistry
Chemistry and Materials Science
Combustion
Hardening
Heating
Inorganic Chemistry
Pressing
Pulverized coal
Sand
Synthesis
Synthesis and Properties of Inorganic Compounds
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Summary:A three-step method is suggested for monolith synthesis from fly ash (large-scale waste from the combustion of pulverized coal at heat and power plants), limestone, and sand, which includes filtration com-bustion with superadiabatic heating, fine grinding, and pressing. X-ray diffraction data for the monoliths at different hardening times are presented. The stock combustion conditions are chosen so as to stabilize the reactive α- and β-modifications of Ca₂SiO₄ and to prevent the undesired formation of γ-Ca₂SiO₄. Monolith hardening by pressing followed by hydration with atmospheric moisture affords a binder with a low water content and a layered turbostratic structure. No analogue of this binder is known now.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023610060069