Effect of hydrophobic alkyl ester side chain on the dispersion and slump retention properties of polycarboxylate superplasticizer

被引：0

作者：

Gao, Rui-Jun ^{[1
]}

Wang, Ling ^{[1
]}

Gao, Chun-Yong ^{[1
]}

Zhang, Ping ^{[1
]}

机构：

[1] State Key Laboratory of Green Building Materials, China Building Materials Academy

来源：

Gongneng Cailiao/Journal of Functional Materials | 2014年 / 45卷 / 13期

关键词：

Adsorption; Dispersing performance; Hydrophobic side chain; Polycarboxylate superplasticizer;

D O I：

10.3969/j.issn.1001-9731.2014.13.032

中图分类号：

学科分类号：

摘要：

In order to study how the hydrophobic side chain in polycarboxylate superplasticizer structure affect the slump loss of the fresh concrete, four polycarboxylate superplasticizer (PCA) with different hydrophobic side chain length were synthesized by free radical copolymerization of maleic anhydride (MAH), methallyl alcohol polyethylene oxide ether (TPEG) and acrylic alkyl ester using ammonium persulfate [(NH4)2SO4, APS] as initiator. The dispersing and flow retention performance of the four PCA was investigated respectively by testing the fluidity of cement paste. The adsorption mechanism of NPC was discussed by testing the adsorption amount and zeta potential. The fluidities and flow loss of cement paste show that the dispersing performance of PCA gradually improves with the increase of the hydrophobic side chain length. The results of the zeta potential and the continuous adsorption ability of PCA on the surface of cement particles gradually increase with increasing the length of the hydrophobic side chain.

引用

页码：13148 / 13152

页数：4

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