Building materials and method of manufacturing same

Details Building materials and method of manufacturing same Building materials and method of manufacturing same

D - Textiles, Paper

21

C

9/66

D21C 9/00 (2006.01) C04B 18/04 (2006.01) C04B 28/00 (2006.01) C04B 28/34 (2006.01) D06M 11/45 (2006.01)

Patent

CA 1175612

ABSTRACT OF THE DISCLOSURE The invention provides a novel light-weight building material suitable for heat and sound insulation from an aluminum hydroxide sludge, which is a very noxious industrial waste material, and disintegrated scrapped paper as the base components. The sludge is first alkalified by the addition of sodium hydroxide to dissolve the gel-like aluminum hydroxide in the form of sodium aluminate and then admixed with the disintegrated scrapped paper to give a slurried mixture which is next neutral- ized to a weakly acidic condition by adding phosphoric acid whereby insoluble phosphates are deposited on the cellulosic fibers. The slurried mixture is further admixed with a coagulating agent to give a coagulated mass of the fibrous material with deposition of the phosphates. The coagulated mass is then separated from the liquid portion and dried to give a light- weight mass which is used as a blow-on insulating material for buildings or as a material for shaping an insulating board or slab.

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