Cement admixture having superior water-reducing properties...

Details Cement admixture having superior water-reducing properties... Cement admixture having superior water-reducing properties...

C - Chemistry, Metallurgy

04

B

C04B 24/26 (2006.01) C04B 24/16 (2006.01) C08G 65/26 (2006.01) C08L 71/02 (2006.01)

Patent

CA 2488415

The present invention provides a cement admixture that comprises at least one of a carboxylic acid based copolymer comprising a reactive surfactant as a monomer or a copolymer salt obtained by neutralizing the copolymer with an alkaline substance, a method for preparing the same, and a cement composition comprising the same.The cement admixture of the present invention increases composition fluidity even at a high water-reducing formulation by improving dispersibility of cement particles, prevents a decrease of fluidity as the function of time, and offers good workability by supplying an adequate amount of air flow continuously.

L'invention porte sur un adjuvant pour ciment comportant au moins un copolymère à base d'acide carboxylique comprenant comme monomère un tensio-actif réactif, et un sel de copolymère obtenu par neutralisation du copolymère par une substance alcaline, sur son procédé de préparation, et sur une composition de ciment le comprenant. Ledit adjuvant: accroît la fluidité de la composition même en cas de forte réduction de l'apport en eau en améliorant la dispersibilité des particules de ciment, empêche la baisse de fluidité dans le temps, et confère une bonne ouvrabilité en fournissant continuellement la quantité d'air voulue.

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