Cementitious compositions and aggregate derivatives from said compositions
First Claim
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1. Cementitious composition comprising:
- (a) the anhydrous spent residue from a fluidized combustion bed of the type wherein limestone particles are suspended in a dry condition in the presence of a carbonaceous fuel in a fluidized medium and wherein the carbonaceous fuel is ignited within said fluidized medium to capture therein substantial amounts of SOx which is generated upon ignition of said carbonaceous fuel said residue containing coal ash which is substantially free of finely divided siliceous-alumina glass compounds,(b) water, and(c) pozzolanic materials.
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Abstract
Cementitious compositions and aggregate derivatives of said compositions wherein fluidized bed combustion residue and pozzolanic material, such as pulverized coal combustion system fly ash, are incorporated in a cementitious mix. The mix is cast into desired shape and cured. If desired, the shape may then be crushed so as to result in a fluidized bed combustion residue-fly ash aggregate material or the shape may be used by itself.
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Citations
15 Claims
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1. Cementitious composition comprising:
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(a) the anhydrous spent residue from a fluidized combustion bed of the type wherein limestone particles are suspended in a dry condition in the presence of a carbonaceous fuel in a fluidized medium and wherein the carbonaceous fuel is ignited within said fluidized medium to capture therein substantial amounts of SOx which is generated upon ignition of said carbonaceous fuel said residue containing coal ash which is substantially free of finely divided siliceous-alumina glass compounds, (b) water, and (c) pozzolanic materials. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Cementitious composition comprising:
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(a) about 10-90% by weight of the anhydrous spent residue from a fluidized combustion bed of the type wherein limestone particles are suspended in a dry condition in the presence of a carbonaceous fuel in a fluidized medium and wherein the carbonaceous fuel is ignited within said fluidized medium to capture therein substantial amounts of SOx which is generated upon ignition of said carbonaceous fuel, said residue containing coal ash which is substantially free of finely divided siliceous-alumina glass compounds, (b) water, and (c) about 90-10% by weight fly ash.
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Specification