Abstract
HPEG has long been widely used as an alternative to TPEG. In this study, a new high-performance HPEG-type polycarboxylate superplasticizer PCE-A was synthesized by using H2O2 and sodium hypophosphite/Vc redox initiation system to provide free radicals under aqueous polymerization conditions with HPEG and acrylic acid as the main raw materials. The results showed that the best performance of the synthetic polycarboxylate superplasticizer was achieved when the acid to ether ratio was 4.50, Vc was 0.25%, H2O2 was 0.80% and sodium hypophosphite was 1.7%, which could effectively reduce the amount of admixture without affecting the working performance of concrete, and the concrete strength was higher.
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