Influence of adding time of superplasticizers on adsorption behavior and dispersive performance of cement pastes

被引：0
作者：
机构：
[1] State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology
来源：
Ma, B. (mbgjob@163.com) | 1600年 / Chinese Ceramic Society卷 / 41期
关键词：
Addition time; Adsorption; Cement paste; Dispersion performance; Superplasticizer;
D O I：
10.7521/j.issn.0454-5648.2013.06.07
中图分类号：
学科分类号：
摘要：
The adsorption behavior, zeta potential and fluidity of the cement paste as well as their mutual relations were investigated to clarify the effect of superplasticizers (i.e., naphthalene formalde sulfonate (NFS) and polycarboxylic copolymer (PCC)) on the adsorption and dispersion of the cement paste. The results show that the adsorption amount of NFS and PCC on cement particles decreases with the deteration of adding superplasticizer. The adsorption, zeta potential and fluidity of the cement paste varied with the time of adding superplastizer. The adsorption amount and the zeta potential both reduced with the deteration of adding time. The best adding time of NFS was 10 min after mixing water. The adsorption degree of NFS on cement particles was quite small and the fluidity of cement paste reached superior when PCC and water were added simutaneously.
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页码：761 / 765
页数：4
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