1. The method used to produce waterproof gypsum products is from fragmented calcium sulfate. Its water/solid ratio is less than 0.4:1, its scattering rate is 8 to 12, and its shallow body has waterproof surface, which is 8 to 12 by weight. Hydrate powder from hydrate cement.

摘要

Method for producing a product Waterproof plaster, which is manufactured from an aqueous dispersion of Calcium sulfate fraguable with a water / solid ratio lower than 0.4, 1,Dispersion that has a Hollow Light surfaces impervious to water, and 5 to 15% based on the weight of the Hydraulic hydratable Cement Dust.