IMPROVEMENT IN THE GYPSEPLATE MIXTURE COMPACTION PROCESS FOR OBTAINING NEW WATERPROOF MATERIALS

摘要

A settable molding composition comprising a mix of gypsum, plaster, water [which may be provided in whole or in part by utilizing a "wet" gypsum component] and an essentially water-insoluble metallic salt of an organic fatty acid [the "waterproofing" agent] is readily pressure compacted or molded into a variety of useful shaped articles, e.g., modular constructional units and other load-bearing members. The resultant shaped articles are highly water repellent, display excellent mechanical properties, are effectively set even in the absence of any drying step, and are even well suited for certain building elements adapted to be exposed to an outside environment.