Agent for impregnating stone and shaped stonework or for the production of modelable compounds and compounds containing said agent and mineral solids

摘要

The proposal concerns an aqueous agent for impregnating and preserving stonework which contains at least one inorganic silicon compound and, according to the invention, consists of a water-based electrolyte-containing, acid alkaline metasilicate solution. Preference is given to sodium metasilicate and above all potassium metasilicate. The agent contains alkaline metal salts or ammonium salts as the electrolyte. The acid is a strong one, preferably hydrosilicofluoric acid. The pH is preferably raised to up to 2.5 by the addition of ammonia solution. To construct mineral-based mouldings, granular and powdered mineral solids are added to a corresponding solution and made into a compound which slowly hardens on being left to stand.