Effects of Clay on Flow Properties of Polycarboxylate Superplasticizer and Its Control Measure

被引：4
|
作者：
Liu, Xiao [1 ]
Wang, Ziming [1 ]
Wu, Hao [2 ]
Li, Huiqun [1 ]
机构：
[1] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
[2] Chem Ind Press, Beijing 100011, Peoples R China
来源：
MATERIAL DESIGN, PROCESSING AND APPLICATIONS, PARTS 1-4 | 2013年 / 690-693卷
基金：
中国国家自然科学基金;
关键词：
polycarboxylate superplagticizer; clay; cement; fluidity; mortar;
D O I：
10.4028/www.scientific.net/AMR.690-693.682
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Polycarboxylate superplasticizer (PCE) was usually sensitive to clay in mortar or concrete. The flow properties of cement pastes and mortars for PCEs with either kaolin or bentonite were studied systematically. The results showed that bentonite had a stronger influence on PCE's performance than kaolin, even no fluidity when bentonite dosage was more than 2%. The adsorption amount of bentonite on PCE was about 5-10 times more than that of kaolin, and PCE's adsorption on clay was proportional to its sensitivity to clay. The influencing mechanism of clay on PCE was analyzed from the structures of kaolin and bentonite and their adsorption characteristics between interlayer. The result of exploring control measure showed that adding the synthesized pre-adsorbent can effectively inhibit the effect of clay on PCE and ensure its workability.
引用
收藏
页码：682 / +
页数：2
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