| abstract |
The invention provides a strong-adsorption fast-dispersion polycarboxylic acid water reducing agent and a preparation method thereof, wherein the water reducing agent comprises an unsaturated polyether macromonomer, an unsaturated functional small monomer, an oxidant, a reducing agent, a molecular weight regulator and a biomass functional auxiliary agent, the dosage of the unsaturated functional small monomer is 5-15% of the mass of the unsaturated polyether macromonomer, the dosage of the oxidant is 0.1-1% of the mass of the unsaturated polyether macromonomer, the dosage of the reducing agent is 0.1-2% of the mass of the unsaturated polyether macromonomer, the dosage of the molecular weight regulator is 0-1% of the mass of the unsaturated polyether macromonomer, and the dosage of the biomass functional auxiliary agent is 5-15% of the mass of the unsaturated polyether macromonomer. The polycarboxylate superplasticizer can effectively solve the problems of poor compatibility with cementing materials, poor early fluidity of concrete, abnormal coagulation and hardening and excessive mixing of the superplasticizer in the existing superplasticizer. |