| abstract |
Disclosed is an admixture cement composition for concrete containing a cement dispersant for the purpose of improving the workability of a cement composition having a low water powder ratio and improving the performance of a cured product. A copolymer comprising the following repeating units (A) and (B) as a cement dispersant and having a weight average molecular weight of 5,000 to 100,000, the molar ratio of (A) Is 10 to 50%, and (A) is two or more kinds represented by the following formulas, The molar ratio of (B) is 30 to 90%, and (B) is any one kind or two or more kinds represented by the following formula (B-1) or the like. [Selection] Figure 1 |