聚羧酸类混凝土高效减水剂的合成与应用性能研究

Superplasticizer synthesis and applicable performance of plolycarborxylic acid concrete

本文合成了带有支链的聚羧酸类高效减水剂,探讨了分子量控制和支链长度对其减水率和坍落度保持性的影响。与萘系和氨基磺酸系高效减水剂相比较,合成的聚羧酸类减水剂具有用量少,减水效果好,混凝土坍落度损失小,不含甲醛,是一种很有发展前景的高效绿色减水剂。并对该类高效减水剂的分散机理进行了探讨和解释。

In this paper, polycarboxylce superplasticizer has been synthesized and the influences of molecular weight as well as polyoxyethylene side chain on the ratio of reducing water and loss of slump also have been studied detailedly. Compared with other types water reducer, the results show that polycarboxylic superplasticizer posses some superior characteristics, such as low admixing dosage, high water reduction, long time for keeping fluidity and no harmfulness to the human, hence this type reducer is a kind of promising superplasticizer. Action mechanisms in concrete also have been discussed.