The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1998
Filed:
Feb. 12, 1997
Robert William Styron, Marietta, GA (US);
Mineral Resource Technologies, LLC, Atlanta, GA (US);
Abstract
The present invention is directed to blended hydraulic cement compositions which are formed with subbituminous fly ash. In a first embodiment, the cement composition comprises 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 potassium carbonate; from about 0.1 wt. % to about 4 wt. % of the total composition of citric acid; and from about 85 wt. % to about 99.7 wt. % of the total composition of a subbituminous fly ash. In a second embodiment, the cement composition comprises from about 0.1 wt. % to about 7 wt % of the total composition of a retarding agent; 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; from about 0.1 wt. % to about 4 wt. % of the total composition of citric acid; from about 25 wt. % to about 91.7 wt. % of the total composition of a first subbituminous fly ash having a lime content; and from about 8 wt. % to about 60 wt. % of the total composition of a second fly ash selected from the group consisting of lignite fly ash, bituminous fly ash and scrubber material.