Process for compacting under pressure plaster-based mixtures

Details Process for compacting under pressure plaster-based mixtures Process for compacting under pressure plaster-based mixtures

B - Operations, Transporting

28

C

25/122

B28C 7/04 (2006.01) B28B 5/02 (2006.01) B28C 7/12 (2006.01) C04B 28/14 (2006.01)

Patent

CA 1131431

Abstract of the Disclosure It is known to prepare products from plaster using high pressure techniques. This process involved expensive pressure equipment, and energy consuming drying processes. The present invention seeks to overcome these drawbacks by providing a process for compacting under lower pressure wet gypsum or gypsum-plaster mixtures characterised in that the invention is performed by means of a plaster in which the Blaine surface is from 2,500 to 7,000 cm2/g, the percentage by weight of plaster in the mixture is from 30% to 99%, and the excess of water relative to the stoichiometric amount for subsequent setting of the mixture is from 0 to 15% of the total weight of the mixture. The process according to the invention can be used for producing any cast member which can be used as a load-carrying material, in particular tiles, blocks, plates, juxtaposed composites, facade members, casings, floors and load-carrying beams.

296478

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