This invention relates to the field of concrete admixtures, specifically to an anti-mud polycarboxylate
superplasticizer, its preparation method, and its application. The anti-mud polycarboxylate
superplasticizer provided by this invention comprises, by weight, the following raw materials: 100-180 parts of unsaturated polyether
monomer, 5-10 parts of unsaturated
carboxylic acid monomer, 2-5 parts of air-entraining
monomer, 5-10 parts of anti-mud monomer, 10-20 parts of oxidant, 0.4-0.6 parts of
reducing agent, 5-7 parts of
chain transfer agent, and 150-300 parts of water; the air-entraining monomer and the anti-mud monomer have specific structures. The simultaneous introduction of specific anti-mud monomers and air-entraining monomers into the anti-mud polycarboxylate
superplasticizer of this invention not only reduces clay adsorption but also provides better dispersibility and anti-mud effect at lower dosages, increasing the overall workability of concrete and improving concrete performance.