Process for making a blended hydraulic cement
AssigneeMineral Resource Technologies, LLC
InventorRobert William Styron
Life of this patent
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Abstract
The present invention is directed to processes for making blended hydraulic cement compositions. In one embodiment, the process includes the steps of: providing from about 85 wt. % to about 99.7 wt. % of the total composition of a subbituminous fly ash; separating out about a 10% portion of the fly ash; adding from about 0.1 wt. % to about 7 wt. % of the total composition of a retarding agent, from about 0.1 wt. % to about 4 wt. % of the total composition of citric acid, and from about 0.1 wt. % to about 4 wt. % of the total composition of potassium carbonate to the 10% portion; and blending the remainder of the ash with the 10% portion to create a blended hydraulic cement composition.
Claims18
A process for making a blended hydraulic cement composition comprising:
- (a) providing a quantity of a subbituminous fly ash having a lime content, said quantity forming from about 85 wt. % to about 99.7 wt. % of the blended hydraulic cement composition;
- (b) separating out about a 10% portion of the fly ash;
- (c) adding to the 10% portion of (b), from about 0.1 wt. % to about 7 wt. % of a retarding agent from about 0.1 wt. % to about 4 wt. % citric acid, and from about 0.1 wt. % to about 4 wt. % potassium carbonate
- (d) adding from about 1 wt. % to about 10 wt. % of a strength enhancing additive to the 10% portion of (b);
- and
- (e) blending the remainder of the subbituminous fly ash with the 10% portion of (b) to produce a blended hydraulic cement composition.
A process for making a blended hydraulic cement composition comprising:
- (a) providing a quantity of a first subbituminous fly ash having a lime content, said quantity forming from about 25 wt. % to about 91.7 wt. % of the blended hydraulic cement composition;
- (b) separating out about a 10% portion of the first fly ash;
- (c) adding to the 10% portion of (b), from about 0.1 wt. % to about 7 wt. % of a retarding agent, from about 0.1 wt. % to about 4 wt. % of the total composition of citric acid, and from about 0.1 wt. % to about 6 wt. % of the total composition of an alkali source selected from the group consisting of potassium carbonate, potassium hydroxide and blends thereof,;
- (d) adding to the 10% portion of (b), from about 8 wt. % to about 60 wt. % composition of a second fly ash comprising lignite fly ash, bituminous fly ash or scrubber material;
- and
- (e) blending the remainder of the first fly ash with the 10% portion of (b) to produce the blended hydraulic cement composition.
Dependencies are inferred from the claim text.