| 摘要 |
PROBLEM TO BE SOLVED: To obtain a multipurpose cement-dispersing, shrinkage-compensating and corrosion-resistant polymer and a admixture including the above polymer, which improve the processability and early strength development of fresh concrete. SOLUTION: The polymer is an acrylic polymer modified with ester and amide groups, which can be obtained by copolymerizing (1) acrylic acid or methacrylic acid, (2) acrylic or methacryllic methoxypolyalkyleneglycolester monomer with 2-300 mols of oxyalkylene group having 2-3 carbon atoms, (3) the acrylic or methacrylmethoxypolyalkyleneglycolamide monomer with 2-300 moles of oxyalklene group each having 2-3 carbon atoms if necessary, (4) an acrylic or methacrylic ester of tertiary alkanolamine, and (5) the primary or secondary aliphatic or alicyclic or aromatic amine if necessary. |
