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从聚羧酸减水剂合成设计的角度,研究了AMPS和HEA不同摩尔比对聚羧酸减水剂性能的影响。同时对比了聚羧酸减水剂和萘系减水剂在混凝土强度、收缩率、抗硫酸盐侵蚀方面的性能差异。结果表明:AMPS随着摩尔比的增加,可以有效提升减水剂的分散性,并能降低浆体黏度,表现为余浆含固量的降低,此外,还能缩短混凝土的凝结时间;HEA可以提升减水剂的保持能力,但会增加混凝土的含气量。聚羧酸减水剂与萘系减水剂的对比试验表明,聚羧酸减水剂相比于萘系减水剂有更高的减水率以及更好的耐久性能。
From the perspective of the synthesis of polycarboxylate superplasticizer, the effect of different mole ratios of AMPS and HEA on the properties of polycarboxylate superplasticizer was studied. At the same time, the performance difference of concrete strength, shrinkage rate and sulfate resistance were compared between polycarboxylate superplasticizer and naphthalene superplasticizer. The results showed that with the increase of molar ratio, AMPS could effectively enhance the dispersibility of the superplasticizer and reduce the viscosity of the syrup, which showed the decrease of the residual solids content. In addition, the coagulation time of concrete could be shortened. The HEA could Enhance the ability to maintain water-reducing agent, but will increase the air content of concrete. Polycarboxylate superplasticizer and naphthalene superplasticizer comparative tests showed that polycarboxylate superplasticizer compared to naphthalene superplasticizer has a higher water reduction rate and better durability.