| abstract |
(57) [Summary] [Structure] (A) (B) General formula [Chemical formula 1] (Each symbol is as described in the description), relative to 100 parts by weight of a copolymer of the polyoxyalkylene derivative represented by (B) and (b) maleic anhydride, the free acid type or salt type copolymer thereof. (B) Polyoxyalkylene derivative represented by the general formula YO (R 1 O) d (C 2 H 4 O) e (R 2 O) f H (each symbol is as described in the description). An additive for cement containing as an active ingredient a mixture of 01 to 5 parts by weight. [Effect] In addition to having high water reducing property and high slump loss preventing property, it is easy to adjust the amount of air carried during cement mixing. |