Method for the treatment of fly ash

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 28/04 (2006.01) C04B 7/52 (2006.01) C04B 14/04 (2006.01) C04B 18/08 (2006.01) C04B 20/02 (2006.01) C04B 40/00 (2006.01)

Patent

CA 2503585

Method for treatment of fly ash for preparation of mortars and concretes. The invention is characterized in, that in a first step fly ash is intensively blended with a highly-reactive and dry cement mixture, which mixture have been obtained by mixing Portland cement with a microfiller and possibly a water reducing agent and by grinding said mixture, in that, in a second stage the so obtained blend is intergrinded in a vibratory milling device to achieve the fineness of the final product with a retention on a 45~m sieve which is less than 15 percent by weight.

L'invention concerne un procédé de traitement des cendres volantes pour la préparation de mortiers et de bétons. L'invention est caractérisée en ce que des cendres volantes d'une première étape sont intensivement mélangées avec un mélange de ciment durci hautement réactif, lequel mélange a été obtenu par le mélange de ciment Portland avec un microfiller et éventuellement un agent de réduction d'eau et le broyage dudit mélange. L'invention est également caractérisée en ce que, dans une seconde étape le mélange ainsi obtenu est broyé dans un dispositif de broyeuse par vibration afin d'obtenir la finesse du produit final qui présente une rétention sur un tamis de 45?m inférieure à 15 % en poids.

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