超长侧链型梳形聚羧酸减水剂对水泥浆体分散与早期水化的影响  

Effects of Polycarboxylate Superplasticizer with Super-length Side Chains on Dispersion of Cement Paste and Early Hydration

作　　者：陆加越[1,2] 乔敏[1,2] 冉千平[1,2] 沙建芳[1,2] 刘加平[1] 

机构地区：[1]江苏省建筑科学研究院高性能土木工程材料国家重点实验室,南京210008 [2]江苏博特新材料有限公司,南京210008

出　　处：《混凝土与水泥制品》2012年第8期15-17,共3页China Concrete and Cement Products

摘　　要：使用不饱和醇经过阴离子开环聚合加成环氧乙烷(EO)制得分子量较高的聚醚大单体,并进一步合成出超长侧链型梳形聚羧酸减水剂。考察了该减水剂对水泥浆体分散和早期水化的影响,结果发现,相比传统酯化法制得的超长侧链型梳形聚羧酸减水剂,合成的超长侧链型聚羧酸减水剂具有更好的分散和分散保持性能,且早强性能不降低,合成过程更简单、更环保。The polyether macro-monomer with high molecular weight is synthesized by the way of anionic ring opening polymerization. The polycarboxylate superplasticizer with super-length side chains is synthesized using the polyether macro-monomer. The effects of polycarboxylate superplasticizer with super-length side chains on the dispersion and early hydration of cement paste are investigated. Compared with the polycarboxylate superplasticizer using the macro-monomer obtained by esterification method, the superplastieizer here has better dispersion and better retention of dispersion, and without any reduction of early strength. The method in this paper is simpler synthesis and friendlier to environment.

关 键 词：超长侧链 聚羧酸 水化 分散 早强 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]