Effect of Air Entraining Agent on Properties of Aqueous Solutions and Concretes

被引：0

作者：

Shan G. ^{[1
]}

Lu C. ^{[2
]}

Chen J. ^{[1
]}

Gao N. ^{[1
]}

Qiao M. ^{[1
]}

Ran Q. ^{[1
,3
]}

Liu J. ^{[1
,3
]}

机构：

[1] State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co. Ltd., Nanjing

[2] China Three Gorges Corporation, Beijing

[3] School of Material Science and Engineering, Southeast University, Nanjing

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2020年 / 48卷 / 08期

关键词：

Air entraining agent; Air-void; Foam; Interfacial free energy; Surface activity;

D O I：

10.14062/j.issn.0454-5648.20200003

中图分类号：

学科分类号：

摘要：

Alkyl sulfate surfactants with different hydrophobic chains (i.e., C8-C14) and surfactants with different anionic groups (i.e., sulfate, sulfonate and phosphate) were analyzed, and the effects of hydrophobicity and ionic groups on the surface activity, foam behavior and air-entraining performance in cement mortars were investigated. The results show that the more intense interfacial self-assembly behavior of surfactants can reduce the interfacial free energy and increase the surface activity, thus resulting ina greater foaming property of aqueous solutions and a higher air entraining performance in cement mortars. Sodium lauryl sulfate has the maximum interfacial self-assembly density, the minimum interfacial free energy, and the superior air entraining performance in aqueous solutions and cement mortars, as well as the optimum air-void adjustment performance of hardened cement mortars. © 2020, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：1256 / 1262

页数：6

共 15 条

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