Effect of surface modification of colloidal particles in polymer latexes on cement hydration

被引：39
|
作者：
Lu, Zichen [1 ]
Kong, Xiangming [1 ]
Zhang, Chaoyang [1 ]
Xing, Feng [2 ]
Cai, Yi [1 ]
Jiang, Lingfei [1 ]
Zhang, Yanrong [1 ]
Dong, Biqin [2 ]
机构：
[1] Tsinghua Univ, Dept Civil Engn, Beijing 100084, Peoples R China
[2] Shenzhen Univ, Guangdong Prov Key Lab Durabil Marine Civil Engn, Dept Civil Engn, Shenzhen 518060, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 155卷
基金：
中国国家自然科学基金;
关键词：
Cement; Polymer; Adsorption; Hydration; Retardation; OIL-WELL CEMENT; POLYCARBOXYLATE SUPERPLASTICIZERS; PORTLAND-CEMENT; PORE SOLUTION; RETARDATION; TEMPERATURE; ADSORPTION; MORTAR; PASTES;
D O I：
10.1016/j.conbuildmat.2017.08.114
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Two styrene-acrylate (SA) polymer latexes with and without the introduction of PEO hairy layer on the surface of colloidal particles were synthesized. The impacts of the latexes on setting time and cement hydration were evaluated. The hydrolysis of acrylate contained in the polymers and the complexation ability of the generated carboxyl group with Ca2+ were investigated. It is found hairy layer of colloidal particles minimizes the retardation effect on cement hydration, although it does not mitigate the acrylate hydrolysis and the complexation effect of generated carboxyl groups. Hairy surface reduces the adsorption of polymer on cement surface and consequently leads to less retardation effect on cement hydration. (C) 2017 Published by ElSevier Ltd.
引用
收藏
页码：1147 / 1157
页数：11
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