Fly ash composites and methods for making same
AssigneeMidway Environmental Associates, Inc.
InventorWilliam M. Strabala
Life of this patent
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Abstract
Composite materials having fly ash as a constituent is manufactured into a sulfur-less gypsum-like material, a portland cement-like material and a lightweight aggregate. Methods for making such composite materials include combining precipitated calcium carbonate and either Class C-fly ash, Class F-fly ash and/or bottom ash in particular ratios by adding water to dry material and subsequently allowing the material to dry to create the above-described products. Methods for forming and using such composites include the use of a single piece gatefold form for casting manifold surfaces, a panel system for forming concrete walls and a system for creating retaining walls.
Claims12
A composition, comprising:
- a powder comprising F-class fly ash and lime, said powder calcined at a temperature of between about 800° C. and 900° C. for a time period of at least about 10 minutes, said powder, when mixed with between 90 weight percent and 130 weight percent of water, producing a material, that when dried, can withstand at least about 200 psi compression load.
A composition, comprising:
- a powder comprising non-pozzolanic F-class fly ash and lime, said powder calcined at a temperature of at least about 1,000° C., to form a clinker first product, said first product, after being powderized, mixed with between about 90 weight percent and 130 weight percent water and allowed to dry, producing a second product having a specific gravity of 2.0 and capable of withstanding a compression load of about 1000 psi.
A composition, comprising between about 33 weight percent and 60 weight percent of lime prior to calcining, the remainder of said composition comprising bottom ash and non-pozzolanic F-class fly ash in approximately equal amounts, the combined mixture of lime, bottom ash and F-class fly ash being heated to a temperature of at least about 1,000° C., said resultant material, after being powderized, mixed with between about 90 weight percent and 130 weight percent of water, and dried, producing a product having a strength of between about 1,000 psi and about 2,000 psi.
A composition produced by a process comprising:
- providing non-pozzolanic F-class fly ash;
- creating a mixture by mixing said F-class fly ash with between about 33 weight percent and 60 weight percent precipitated lime prior to calcining;
- and
- calcining said mixture at a temperature of between about 800° C. and 900° C.
Dependencies are inferred from the claim text.