Effects of Polycarboxylate Superplasticizers on Hydration and Microstructure of Hardened Cement Paste

被引：2
|
作者：
Gao, Ruijun [1 ]
Lv, Shenghua [1 ]
Cao, Qiang [1 ]
机构：
[1] Shaanxi Univ Sci & Technol, Coll Resource & Environm, Xian 710021, Shaanxi, Peoples R China
来源：
EMERGING MATERIALS AND MECHANICS APPLICATIONS | 2012年 / 487卷
关键词：
polycarboxylate; superplasticizer; hydration; microstructure; CHEMICAL-STRUCTURE; PERFORMANCE;
D O I：
10.4028/www.scientific.net/AMR.487.692
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Polycarboxylate (PC) superplasticizer was synthesized by radical copolymerization using ammonium persulfate (APS) as initiator at 90 degrees C for 5 h. The effect of PC on the hydration process and microstructure of hardened cement at different hydration ages (4 h, 1 d and 7 d) was investigated. Hydration of cement paste results show that the nucleation and growth of hydration product of ettringite (Aft) was inhibited by PC at the early hydration ages, and the generation of the hydration products of calcium hydroxide (CH) and calcium carbonate (CaCO3) was promoted at late hydration ages. SEM result indicates that PC can make the structure of hardened cement more homogeneous and more density.
引用
收藏
页码：692 / 696
页数：5
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