Method and device for spraying an aqueous slurry onto a wall...

Details Method and device for spraying an aqueous slurry onto a wall... Method and device for spraying an aqueous slurry onto a wall...

B - Operations, Transporting

22

D

B22D 41/02 (2006.01) F27D 1/16 (2006.01)

Patent

CA 2232984

Water is kneaded into a predetermined dry composition to give an aqueous slurry which is then pumped through a pipe (12) to a nozzle (13) into which compressed air is injected in order to spray said aqueous slurry. The aqueous slurry is mechanically stirred to foam and/or swell the surfactant and the stirring power and/or speed and/or time is (are) adjusted in order to control the foaming and/or swelling rate of the surfactant and thus vary the porosity of the sprayed coating (3).

On malaxe une composition prédéterminée sèche avec de l'eau pour préparer la boue aqueuse, puis on pompe ladite boue aqueuse dans une tubulure (12) jusqu'à une buse (13) dans laquelle on injecte de l'air sous pression pour projeter ladite boue aqueuse. On agite mécaniquement ladite boue aqueuse pour faire mousser et/ou gonfler le tensioactif et on règle la puissance et/ou la vitesse et/ou le temps d'agitation pour faire mousser et/ou gonfler plus ou moins fortement le tensioactif afin de faire varier la porosité du revêtement projeté (3).

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