Process for applying a cementitious material to a structural base and article produced therefrom

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.

Dependencies are inferred from the claim text.