| abstract |
(57) [Summary] [Structure] A copolymer containing, as an essential component, a polyoxyalkylene compound having an average added mole number of 51 to 200 and maleic anhydride, or a hydrolyzate of the copolymer, or a copolymer thereof. A cement strengthener comprising a water-reducing agent comprising at least one salt of the hydrolyzate and a soluble calcium salt. [Effect] Increases the initial fluidity of the cement composition, prolongs the fluidity retention time, shortens the condensation time and promotes the development of strength, and is used as a water reducing agent for ready-mixed concrete, a fluidizing agent, and a high-performance AE water reducing agent. , Or as a high-performance water reducing agent for the production of secondary concrete products, and as a water reducing agent for premix products |