Research on synthesis and performance of a slowly-released and highly slump retaining type of polycarboxylate superplasticizer

In order to satisfy the requirement of highly slump retaining type of polycarboxylate superplasticizer in the constructional market,the synthesis of a novel slowly-released and highly slump retaining type of superplasticizer had been developed. A slowly-released and slump retaining agent with the good disperse retaining was prepared by orthogonal test,the incidence of the four monomers in which had been compared. Moreover,the influence of chain transfer agent dosage on the dispersion property was studied. The slump retaining effect of product mixed with superplasticizer was obviously better than that of single using,and the optimum ratio between product and superplasticizer was 3 ∶7,which had extensive compatibility in different cement. The result of the high temperature application experiments in the concrete showed that the product had high water reducing ratio and excellent slump retaining ability.