| abstract |
An admixture for a hydraulic composition includes a polycondensation product P containing a copolymer prepared by polycondensation of a monomer mixture containing compounds A to C of the following Formulae (A) to (C); and a polycarboxylic acid-based polymer Q including a structural unit having an amino and an imino group, and/or a structural unit having an amino, imino, and amido group: n n n n n n n n n n n n (wherein R 1 is a hydrogen atom, alkyl, or alkenyl group; A 1 O is a C 2-4 alkylene oxide group; p is a number of 1 to 300; and X is a hydrogen atom, an alkyl, or acyl group; R 2 is an alkyl or alkenyl group; A 2 O is a C 2-4 alkylene oxide group; q is a number of 1 to 300; and Y 1 is a phosphate ester group; and R 3 is a hydrogen atom, carboxy, alkyl, alkenyl, phenyl, naphthyl, or heterocyclic group; and r is a number of 1 to 100). |