1) The appropriate dosage of high-efficiency water reducer is: for air-entraining types such as methyl naphthalene series, polycyclic aromatic anthracene series, etc., the dosage is 0.5% to 1.0% of the cement content; for non-air-entraining types such as melamine resin series, naphthalene series water reducer, the dosage can be selected between 0.3% and 5%, and the dosage is