Alkali sorption by C-S-H and C-A-S-H gels - Part II. Role of alumina
Alkali sorption by C-S-H and C-A-S-H gels - Part II. Role of alumina
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DOI：
10.1016/s0008-8846(02)00753-6
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发表时间：
2002-07-01
影响因子：
11.4
通讯作者：
Glasser, FP
中科院分区：
文献类型：
--
作者：
Hong, SY;Glasser, FP
在第一部分中，它表明，C-S-H凝胶和水相之间的碱分配可以表示为分配函数，R-d，其数值，在恒定温度下，由Ca/Si比定义。该R-d值在高达0.3M的NaOH和KOH浓度的宽范围内是恒定的或接近恒定的。本文研究了Al对C-A-S-H凝胶吸碱性能的影响。显微探针的证据表明，铝实际上是在固溶体。在C-S-H中引入Al显著增加了R-d，表明碱结合增强。结果支持和量化的有益效果，碱结合所产生的铝辅助胶凝材料，如粉煤灰，水泥浆体的引入。(C)2002爱思唯尔科技有限公司版权所有。
In Part I, it was shown that alkali partition between C-S-H gel and an aqueous phase can be represented by a partition function, R-d, the numerical value of which, at constant temperature, is defined by the Ca/Si ratio. This R-d value is constant or nearly so over wide ranges of NaOH and KOH concentrations up to similar to0.3 M. In the present paper, Al has been introduced to form C-A-S-H gels, and the influence of Al on alkali sorption properties was determined: Approximately 6-7% replacement of Si by Al was used. Microprobe evidence is presented to show that the Al is actually in solid solution. Introduction of Al into C-S-H markedly increases R-d, indicating enhancement of alkali binding. The results underpin and quantify the beneficial effects of alkali binding arising from the introduction of aluminous supplementary cementing materials, such as fly ash, into cement pastes. (C) 2002 Elsevier Science Ltd. All rights reserved.