C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 22/14 (2006.01) C01B 33/141 (2006.01) C01B 33/26 (2006.01) C01F 7/74 (2006.01) C04B 14/06 (2006.01) C04B 22/00 (2006.01) C04B 28/02 (2006.01) C04B 40/00 (2006.01)
Patent
CA 2305486
The invention concerns an aqueous suspension comprising: A) silica and/or alumina particles; and B) a compound of global formula (I): Al(OH)a(SO¿4?)b(SiOx)c(Y)¿d? with: a ranging between 0.4 and 2; b ranging between 0.3 and 1.35; c ranging between 0 and 0.1; d being more than 0.05; Y selected among the alkaline and alkaline-earth metals; x ranging between 2 and 4, and its derivatives. Said compound (B) being present in the suspension at a concentration of at least 1.65 mol/l expressed in aluminium mol derived from said compound. It also concerns a method useful for preparing said suspension and their uses in the field of cement pastes, mortars and concrete and particularly as setting and hardening accelerator of cements.
La présente invention concerne une suspension aqueuse comprenant: A) des particules de silice et/ou d'alumine, et B) un composé de formule globale (I): Al(OH)a(SO4)b(SiOx)c(Y)d avec: a compris entre 0,4 et 2; b compris entre 0,3 et 1,35; c compris entre 0 et 0,1; d supérieur à 0,005; Y choisi parmi les métaux alcalins et alcalino-terreux; x compris entre 2 et 4 et ses dérivés, ledit compsé (B) étant présent dans la suspension à une concentration d'au moins 1,65 mol/l exprimé en mole d'aluminium provenant dudit composé. Elle a également pour objet un procédé utile pour la préparation de ladite suspension et leurs utilisations dans le domaine des pâtes cimentaires, des mortiers et des bétons et en particulier à titre d'accélérateur de prise et de raidissement des ciments.
Chane-Ching Jean-Yves
Prat Evelyne
Touzet Sylvie
Rhodia Chimie
Robic
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