Stannous sulfate and gypsum mixture as a retarder in grinding po

Details Stannous sulfate and gypsum mixture as a retarder in grinding po Stannous sulfate and gypsum mixture as a retarder in grinding po

1976-02-11

1977-03-08

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106315, C04B 702, C04B 735

Patent

active

040110923

ABSTRACT:
A process for retarding the hardening rate of the portland cement and blended hydraulic cement by grinding from about 0.5 to 5.0 weight percent of stannous sulfate based on the dry weight of cement clinker in substitution a portion of gypsum as normally used to eliminate the possibility of false set occuring in ground cement and also improve their qualities.

REFERENCES:
patent: 3429724 (1969-02-01), Keenum et al.
patent: 3782991 (1974-01-01), Burge

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