Method for processing of pozzolans

C - Chemistry – Metallurgy – 04 – B

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C04B 20/00 (2006.01) C04B 18/08 (2006.01) C04B 40/00 (2006.01)

Patent

CA 2705381

Method for processing of pozzolans comprising fly ash such as Class F and/or Class C fly ash used for preparation of mortars and concretes, characterized in, that the pozzolans is subjected to a high energetic mechanical processing by means of grinding in a grinding equipment to a fineness of the final product with a retention on a sieve 30 microns being less than 5%, whereby the pozzolan particles receive mechanical impulses when non-cenosphere in the form of coarse scoria particles are disintegrated and whereby the surface of cenosphere grinded particles is activated.

La présente invention concerne un procédé de traitement de pouzzolanes comprenant des cendres volantes telles que des cendres volantes de type F et/ou C utilisées pour la préparation de mortiers et de bétons, caractérisé en ce que les pouzzolanes sont soumises à un traitement mécanique hautement énergétique au moyen d'un broyage dans un équipement de broyage jusqu'à une finesse du produit final, mesurée par sa rétention sur un tamis de 30 microns, étant inférieure à 5 %, les particules pouzzolanes recevant des impulsions mécaniques lorsque des particules autres que cénosphères sous la forme de scories brutes sont désintégrées et la surface des particules broyées cénosphères étant activées.

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