Abstract
Low sensitive type polycarboxylate superplasticizer P-DM is composed of methoxy polyethylene glycol methacrylate, 3-methyl-3-butene-1-ol polyoxyethylene ether, acrylic acid, ester type small monomers A, sulfonic acid type small monomer B, amide type small monomer C, phosphoric acid type small monomer D and silane type small monomer E. The initiator system is hydrogen peroxide-sodium formaldehydesulfoxylate dihydrate redox initiation system. The chain transfer agent is mercaptoethanol. The test results show that the monomer conversion rate of the synthesized P-DM is high and the dosage sensitivity of P-DM is significantly better than that of the conventional ether type polycarboxylate superplasticizer and the conventional ester type polycarboxylate superplasticizer, and the water consumption sensitivity and temperature sensitivity of P-DM is slightly better than that of the conventional ether type polycarboxylate superplasticizer and the conventional ester type polycarboxylate superplasticizer.
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