초록 ▼

This invention provides a process of producing a building product, particularly a gypsum slab having preferably a density of below 800 kg/m3, with gypsum and mixing water. The quantity of mixing water required for rehydration and molding is at least substantially completely introduced into the gypsu

This invention provides a process of producing a building product, particularly a gypsum slab having preferably a density of below 800 kg/m3, with gypsum and mixing water. The quantity of mixing water required for rehydration and molding is at least substantially completely introduced into the gypsum by means of water saturated porous particles added in a distributed form. The process comprises the steps of intimately mixing water saturated particles with pulverous gypsum to form a fluid mixture; converting said fluid mixture at least almost completely without the application of pressure to the shape of a gypsum building product; permitting mixing water of the water saturated particles to be absorbed by the pulverous gypsum, and permitting the resulting mixture to set and harden.

대표청구항 ▼

A semi-dry process of producing a building product, particularly a gypsum slab having a density below 800 kg/m3, with gypsum and mixing water, wherein the quantity of mixing water required for rehydration and molding is at least substantially completely introduced into the gypsum by means of water s

A semi-dry process of producing a building product, particularly a gypsum slab having a density below 800 kg/m3, with gypsum and mixing water, wherein the quantity of mixing water required for rehydration and molding is at least substantially completely introduced into the gypsum by means of water saturated porous filler particles added in a distributed form, said process comprising the steps of: (a) wetting particles consisting predominately of porous filler until they are just substantially saturated and intimately mixing the water saturated filler particles with pulverous calcined gypsum to form a fluid particulate mixture, the amount of water contained in said water saturated particles being limited to assure formation of said fluid particulate mixture and hydration of said calcined gypsum but being insufficient to form a pulpy-liquid phase mixture; (b) forming said fluid particulate mixture, at least almost completely without the application of pressure, into the shape of a gypsum building product; (c) permitting mixing water of the water saturated particles to be absorbed by the pulverous gypsum, and (d) permitting the resulting mixture to set and harden.