Blended hydraulic cement

Details Blended hydraulic cement Blended hydraulic cement

1998-01-30

1999-12-07

Marcheschi, Michael

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106706, 106707, 106708, 106709, 106710, 106735, 106737, 106810, 106738, 106774, 106782, 106785, 106DIG1, C04B 728, C04B 712, C04B 713, C04B 1404

Patent

active

059976322

ABSTRACT:
The present invention is directed to blended hydraulic cement compositions which are formed with subbituminous fly ash. In one 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. % potassium carbonate; from about 0.1 wt. % to about 4 wt. % citric acid; from about 0.1 wt. % to about 5 wt. % lithium carbonate; and from about 85 wt. % to about 99.7 wt. % of a subbituminous fly ash. In another 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 6 wt. % 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. % citric acid; from about 0.1 wt. % to about 5 wt. % lithium carbonate; from about 25 wt. % to about 91.7 wt. % of a first subbituminous fly ash having a lime content; and from about 8 wt. % to about 60 wt. % of a second fly ash selected from the group consisting of lignite fly ash, bituminous fly ash and scrubber material.

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