Fly ash composition and process for making articles therefrom
AssigneeTide Company
InventorMitchell S. Riddle
Life of this patent
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Abstract
The present invention relates to a novel composition which is useful for forming construction blocks and encapsulating hazardous materials, a process for producing blocks and encapsulating the material, and blocks made of the material. This composition is a mixture of pozzoulanic fly ash and bottom ash. The weight ratio of fly ash:bottom ash is preferably in the range 80:20% by weight to 20:80% by weight. The process comprises the steps of (a) blending a dry mixture comprising the ash mixture with water; (b) transferring the blended mixture into a compression zone and (c) compressing the blended mixture in the compression zone to form a brick of the desired size.
Claims17
A fly ash block prepared by:
- (a) blending a dry material with water, wherein said dry material comprises pozzolanic fly ash;
- (b) transferring the blended material to a compression zone, which is sized such that it contains an amount of blended material to produce a fly ash block;
- and
- (c) compressing the blended material at a pressure of 1000 to 2500 psi to form the fly ash block.
A fly ash block prepared by:
- (a) blending a dry material with water, wherein the dry material comprises pozzolanic fly ash and bottom ash;
- (b) transferring the blended material to a compression zone, which is sized such that it contains an amount of blended material to produce a fly ash block;
- and
- (c) compressing the blended material at a pressure of 1000 to 2500 psi to form the fly ash block.
A fly ash block produced by:
- (a) blending a dry material with water, wherein the dry material comprises a mixture of pozzolanic fly ash and an additive comprising lime, gypsum plaster, polymers, resins, volcanic ash, clay, or aggregate;
- (b) transferring the blended material to a compression zone, which is sized such that it contains an amount of blended material to produce a fly ash block;
- and
- (c) compressing the blended material at a pressure of 1000 to 2500 psi to form the fly ash block.
A fly ash block prepared by:
- (a) blending a dry material with water, wherein the dry material comprises a mixture of pozzolanic fly ash and a hazardous material to be encapsulated in the fly ash body;
- (b) transferring the blended material to a compression zone, which is sized such that it contains an amount of blended material to produce a fly ash block;
- and
- (c) compressing the blended material at a pressure of 1000 to 2500 psi to form the fly ash block.
A fly ash block prepared by:
- (a) blending a dry material with water, wherein the dry material comprises a mixture of pozzolanic fly ash and a hazardous material to be encapsulated in the fly ash block, wherein the hazardous material is low yield radioactive waste;
- (b) transferring the blended material to a compression zone, which is sized such that it contains an amount of blended material to produce a fly ash block;
- (c) compressing the blended material at a pressure of 1000 to 2500 psi to form the fly ash block;
- (d) heating a pozzolanic fly ash/bottom ash mixture to a temperature sufficient to liquify the fly ash/bottom ash mixture;
- and
- (e) dipping the fly ash block into the liquified mixture, so as to provide a fly ash glass coating on the exterior surface of the fly ash block.
A fly ash block prepared by:
- (a) forming a dry material comprising pozzolanic fly ash and bottom ash, wherein the fly ash to bottom ash ratio is in the range 80% fly ash:20% bottom ash to 20% fly ash:80% bottom ash, by weight;
- (b) blending the dry material with water, which is added in an amount which is approximately 14% by weight relative to the total weight of the dry material;
- (c) transferring the blended material to a press box, wherein the amount of blended material which is transferred into the press box is dependent on the size of the fly ash block which is to be formed, and the press box is sized so as to contain the correct amount of blended material which is needed in order to produce a block;
- and
- (d) compressing the blended material at a pressure of 1500 to 2500 psi in the press box in order to form the fly ash block.
Dependencies are inferred from the claim text.