Hydration and properties of novel blended cements based on cement kiln dust and blast furnace slag

被引:117
|
作者
Konsta-Gdoutos, MS [1 ]
Shah, SP [1 ]
机构
[1] Northwestern Univ, Dept Civil Engn, Ctr ACBM, Evanston, IL 60208 USA
基金
美国国家科学基金会;
关键词
x-ray diffraction; hydration; compressive strength; cement kiln dust; GGBFS;
D O I
10.1016/S0008-8846(03)00061-9
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The aim of the present paper is to address the key technical issues pertaining to the utilization of cement kiln dust (CKD) as an activator for ground granulated blast furnace slag (GGBFS) to create nonconventional cementitious binders for concrete. The relatively high alkaline content of CKD is the predominant factor preventing its recycling in cement manufacture. However, it was observed that depending on the water-soluble alkali and sulfate compounds, CKD could provide the environment necessary to activate latent hydraulic materials such as GGBFS. Binary blends containing slag and CKDs from different sources were characterized and compared in terms of the rates of heat evolution and strength development, hydration products, and time of initial setting. A study of the effects of the influencing factors in terms of soluble alkali content, particle size, and free lime content was undertaken. The results confirm the dependence of the dissolution rate of slag on the alkalinity of the reacting system, and the importance of the optimum lime content on the rate of strength gain. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1269 / 1276
页数:8
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