| abstract |
The present invention provides an excellent cement dispersibility and water-reducing property even under various temperature environments, has excellent slump loss prevention performance, does not lead to material separation, and is used as a cement composition. An object of the present invention is to provide a cement admixture capable of suppressing an increase in viscosity of the composition and a cement composition using the same. A copolymer comprising a structural unit having an alkenyl group having a specific number of carbon atoms and an unsaturated monocarboxylic acid ester-based structural unit having a specific number of carbon atoms as an active ingredient of a cement admixture, or a copolymer thereof The present inventors have found that the above problems can be solved by using the salt (A), the polyalkylene glycol (B), and the copolymer (C) of acrylic acid and methacrylic acid, and have reached the present invention. [Selection figure] None |