Effect of relative humidity on the reaction products of alkali activated fly ash

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• 作者：M. Criado^a ; ^{mcriado@cenim.csic.es} ; A. Ferná ; ndez Jim&eacute ; nez^b ; I. Sobrados^c ; A. Palomo^b ; J. Sanz^c
• 关键词：Fly ash ; B. Electron microscopy ; B. Spectroscopy ; C. Mechanical properties ; D. Silicate
• 刊名：Journal of the European Ceramic Society
• 出版年：2012
• 期刊代码：53_09552219
• 类别：ms
• 出版时间：August, 2012
• 卷：32
• 期：11
• 页码：2799-2807
• 文件大小：1109 K

摘要

The alkali activation of fly ash (AAFA) is a chemical process in which the ash is mixed with an alkaline activator and cured at a mild temperature to generate compact solids. Both the curing conditions (temperature, time, relative humidity, etc.) and the nature and concentration of the alkali activator play a key role in the development of AAFA micro- and nanostructure, and consequently the properties of these materials. In the present study, fly ash was activated with a 15%water-glass (Na₂SiO₃) + 85%10-M NaOH solution at 85 掳C for 12 h, 7 and 30 days. Two curing methods were used, in which the variable was the relative humidity (RH).