Multitype-adsorptive-group polycarboxylic acid water-reducing agent, method for preparing the same and use thereof

A multitype-adsorptive-group polycarboxylic acid water-reducing agent, consisting of 30-60 wt % of a macromolecule with multitype-adsorptive groups and water, wherein the macromolecule with the multitype-adsorptive groups has a polyethylene glycol side chain and a polymer backbone, wherein adsorption groups of the polymer backbone comprise a carboxylic acid group, a sulfonic acid group and a phosphonic acid group, and the phosphonic acid group is linked to the backbone of the macromolecule with the multitype-adsorptive groups by nucleophilic addition,

• wherein a molecular structure of the macromolecule with the multitype-adsorptive groups has following polymer chain segments:
• (1) a polymer chain segment comprising at least one structural unit 1 represented by Formula 1:
• wherein M1 is H or Na;
• (2) a polymer chain segment comprising at least one structural unit 2 represented by Formula 2:
• wherein M2 is H or Na;
• (3) a polymer chain segment comprising at least one structural unit 4 represented by Formula 4:
• wherein M4 is H or Na;
• and
• (4) a polymer chain segment comprising at least one structural unit 5 represented by Formula 5:
• wherein R1 is H or methyl, Y is a C1-C4 saturated alkylene group or a C2˜C5 saturated linear alkyleneoxy group (—O—C2˜C5—), and P is a number from 15 to 55.