Effects of organosilane-modified polycarboxylate superplasticizer on the fluidity and hydration properties of cement paste

被引：114
作者：
He, Yan [1 ,2 ]
Zhang, Xiong [1 ]
Hooton, R. D. [2 ]
机构：
[1] Tongji Univ, Sch Mat Sci & Technol, Key Lab Adv Civil Engn Mat, Educ Minist, 4800 Caoan Rd, Shanghai 201804, Peoples R China
[2] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 132卷
关键词：
Organosilane-modified polycarboxylate superplasticizer; Synthesis procedures; Adsorption behavior; Dispersing property; Cement hydration; Microstructure; PORE STRUCTURE; ADSORPTION CHARACTERISTICS; RHEOLOGICAL PROPERTIES; SULFATE ION; TIME; IMPERMEABILITY; COMPATIBILITY; PERFORMANCE; ADMIXTURES; SILICATE;
D O I：
10.1016/j.conbuildmat.2016.11.122
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A series of organosilane-modified polycarboxylate (PCE) superplasticizer were synthesized, in which acrylic acid (AA) was partially or completely substituted by 3-(trimethoxysilyl) propyl methacrylate. This study mainly investigated their adsorption behavior, dispersing performance as well as their effects on cement hydration process. Results indicate that partially silylated PCEs exhibit larger adsorption than the reference PCE, decrease zeta potential of cement paste to a larger negative value and improve the fluidity properties of cement paste. The fluidity retention property of organosilane-modified PCEs is weaker, and the viscosity and the yield stress increase more steeply with time. Partially silylated PCEs can accelerate the cement hydration rate, and the mechanical strength is higher at 3 d due to accelerated hydration as well as improved pore structures. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：112 / 123
页数：12
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