4.7 Article

Isothermal reaction kinetics and temperature dependence of alkali activation of slag, fly ash and their blends

期刊

CONSTRUCTION AND BUILDING MATERIALS
卷 45, 期 -, 页码 233-242

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2013.03.061

关键词

Alkali activation; Slag; Fly ash; Isothermal calorimetry; Reaction kinetics; Kinetic models

向作者/读者索取更多资源

Alkali silicate activated Class F fly ash-slag blends containing fly ash as the major constituent (up to 70% by mass) are proportioned to develop sufficient mechanical properties under moist curing conditions. Isothermal calorimetric studies are carried out on OPC, activated slag and fly ash, and selected fly ash-slag blends at 25 degrees C, 35 degrees C, and 40 degrees C to explore their reaction kinetics. OPC and activated slag pastes exhibit similar heat release response, especially at higher temperatures (40 degrees C). For the fly ash-slag blends, the calorimetric responses at ambient and elevated temperatures are markedly different from those of OPC and activated pure slag pastes. Two simple kinetic models are used to extract the relevant parameters of the activation reaction. Increase in temperature within the studied range influences the total heat released by the fly ash rich pastes more than those of slag pastes. For the fly ash rich blends, it is shown using the Knudsen rate constant that higher reaction temperatures are required to extract realistic model-based kinetic parameters. (C) 2013 Elsevier Ltd. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据