Effect of early cement hydration on the chemical stability of asphalt emulsion

被引：70
|
作者：
Wang Fazhou [1 ]
Liu Yunpeng [1 ]
Hu Shuguang [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architecture, Wuhan 430070, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2013年 / 42卷
基金：
中国国家自然科学基金;
关键词：
Asphalt emulsion; Compatibility; Chemical stability; Zeta potential; Portland cement; POLYMER-MODIFIED MORTARS; PORTLAND-CEMENT; CA MORTAR; MIXTURES; BEHAVIOR;
D O I：
10.1016/j.conbuildmat.2013.01.009
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The effect of pH value, Ca2+ concentration and water loss induced by cement hydration on emulsion stability was investigated by measuring the Zeta potential of asphalt droplets. The microstructure of emulsion was also observed by optical microscope. The results indicate that the chemical stability of cationic emulsion is strongly affected by pH value increase and the addition of nonionic emulsifier improves the alkali resistance property of emulsion. However, the chemical stability of anionic emulsion was slightly improved by pH increase. Ca2+ slightly influences the cationic and anionic emulsions due to its small concentration in the cement paste pore solution. The Zeta potentials of both cationic and anionic emulsions were sharply decreased due to water loss. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：146 / 151
页数：6
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