Boards and sheets

Details Boards and sheets Boards and sheets

C - Chemistry, Metallurgy

04

B

25/111, 261/53

C04B 16/02 (2006.01) C04B 28/04 (2006.01)

Patent

CA 1197863

ABSTRACT "BOARDS AND SHEETS" A process for the manufacture of a non-asbestos corrugated sheet comprising forming into corrugated form an aqueous slurry of a mixture comprising, on a dry weight basis, 40-60% cement, 30-40% silica and 5-15% cellulose fibres, compressing said corrugated form so produced in a press to reduce its thickness and increase its density, removing said form from said press and sub- mitting said form to autoclaving to cause reaction to occur between said cement and said silica to form a binder matrix. The aqueous slurry may include a mouldability aid such as finely divided silica, and the corrugated forms are suitably compressed individually and then passed through a steam tunnel partially to harden them before autoclaving. The corrugated sheets formed are suitable for external cladding and roofing.

405049

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