C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 24/26 (2006.01) C04B 40/00 (2006.01)
Patent
CA 2702486
To provide cement additives which render high fluidity and the retention thereof, excellent shrinkage reducing effect and frost-thaw resistance to cement compositions such as mortar and concrete without entraining excessive air, and exhibit excellent solution stability. The present cement additives contain alkenyl group- containing polyalkylene compounds (SR), ester-based poly- carboxylic acid copolymers (PC1) and ether-based polycarboxylic acid copolymers (PC2).
La présente invention concerne des additifs pour ciment qui rendent sa fluidité et sa rétention élevées, qui donnent d'excellents effets réduisant le retrait et résistance au gel-dégel aux compositions de ciment telles que le mortier et le béton sans entraîner d'air excessif, et montrent une excellente stabilité pour la solution. Les présents additifs pour ciment contiennent des composés polyalkylène contenant un groupe alcényle (SR), des copolymères acides polycarboxyliques à base d'ester (PC1) et des copolymères acides polycarboxyliques à base d'éther (PC2).
Iwata Raita
Sugamata Takumi
Sugiyama Tomomi
Construction Research & Technology Gmbh
Gowling Lafleur Henderson Llp
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