The compatibility of polycarboxylate-type superplasticizers with cement

被引：0
|
作者：
Li, CZ [1 ]
Wang, DM
Song, SM
Chen, JL
机构：
[1] Beijing Inst Civil Engn & Architecture, Dept Civil Engn, Beijing 100044, Peoples R China
[2] China Univ Min & Technol Beijing, Dept Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2005年 / 20卷 / 03期
关键词：
PC superplasticizers; cement; compatibility;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Four polycarboxylate-type (PC) superplasticizers of different functional groups were used; their dispersing and retaining behaviors were analyzed through. ZETA potential measurement, mini-slump test Of cement, paste and performance test of concrete. The experimental results show that the dispersing and flow-retaining ability of PC was determined by two factors of anionic groups and nonionic groups : the density of anionic groups - COO- or - SO3 acted on the electronic repulsive force, and the length and proportion of nonionic graft groups of PEO in PC chemical structure affected the steric effect. The compatibility between PC superplasticizers and cement mainly depended on the type of PEO groups; furthermore, adding mineral powders is good to the compatibility for high performance concretes (HPCs)
引用
收藏
页码：95 / 98
页数：4
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