Method for retarding the setting time of rapid hardening cement

Details Method for retarding the setting time of rapid hardening cement Method for retarding the setting time of rapid hardening cement

1974-02-21

1976-05-04

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 90, 106 92, 106 95, 106104, 106315, C04B 702, C04B 735

Patent

active

039544893

ABSTRACT:
This invention relates to a method for retarding the setting time of rapid hardening cement which comprises adding a boric compound to cement manufactured by adding insoluble anhydrite to clinker powder containing 11CaO.7Al.sub.2 O.sub.3.CaX.sub.2 or adding the clinker to insoluble anhydrite and intergrinding the mixture, and a method for still more retarding the setting time of rapid hardening cement which comprises adding a boric compound to cement containing a set-retarding agent other than the boric compound.

REFERENCES:
patent: 2211368 (1940-08-01), Dickens
patent: 2292616 (1942-08-01), Dailey
patent: 3753748 (1973-08-01), Martin
patent: 3782992 (1974-01-01), Uchikawa et al.

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