Study on Preparation of Slow-release Polycarboxylate Superplasticizer by Macromonomer EPEG at Room Temperature

Author:

Chen Hao

Abstract

Abstract Slow-release polycarboxylate superplasticizer was synthetic under room-temperature conditions, a free radical copolymerization reaction occurred under the action of a redox initiator, and the optimal preparation process and temperature effect were discussed in detail. The results show that the best preparation process (EP-15) is: acid-to-ether ratio is 1.89, the amount of NaH2PO2 is 2.27%, the appropriate reaction temperature is 15-25°C, and the suitable macromonomer is EPEG-3000 of OXIRANCHEM. Tests have verified that compared to a commercially available slow-release polycarboxylate superplasticizer (PCE-1), EP-15’s dispersion retention performance and the strength growth of concrete in 3 d, 7 d, and 28 d are significantly better.

Publisher

IOP Publishing

Subject

Computer Science Applications,History,Education

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