Process for applying a cementitious material to a structural bas

Details Process for applying a cementitious material to a structural bas Process for applying a cementitious material to a structural bas

1985-11-12

1988-01-26

Swisher, Nancy

Stock material or miscellaneous articles

Composite

Of inorganic material

428702, 427403, C04B 2902

Patent

active

047216590

ABSTRACT:
A process for applying an aqueous mixture of a magnesium phosphate cementitious material to a base material in which the resulting bond between the materials is improved. In this method the base material is coated with a passivating agent capable of reducing the pH of the surface of the base material prior to applying the aqueous mixture of magnesium phosphate cementitious material. The base material can be a hydraulic cementitious material, e.g., Portland cement. The cementitious material is magnesium phosphate quick-setting cement. Preferred passivating agents can be aluminum acid phosphate, magnesium acid phosphate, aluminum sulfate, ammonium polyphosphate, phosphoric acid, an activator and mixtures thereof. The resulting laminated structure composed of the base material, the coating and the magnesium phosphate cementitious material is also disclosed.

REFERENCES:
patent: 2200433 (1940-05-01), Ripley
patent: 2760885 (1956-08-01), Larson et al.
patent: 2954301 (1960-09-01), Szukiewicz
patent: 2976173 (1961-03-01), Czerwin et al.
patent: 3984269 (1976-10-01), Schneller et al.
patent: 4367247 (1983-01-01), Akerberg
Surface Preparation of Concrete for Paints and Coating, Robert W. Gaul, Concrete Construction Magazine, 5/81, 401-405.
NECO-CRETE 360-MPC Quick Setting Concrete Bag Panel.
SET-45 Chemical Action Concrete Handout.

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