Activation of the fly ash pozzolanic reaction by hydrothermal conditions

被引：82

作者：

Goñi, S ^{[1
]}

Guerrero, A ^{[1
]}

Luxán, MP ^{[1
]}

Macías, A ^{[1
]}

机构：

[1] CSIC, Inst Construct Sci Eduardo Torroja, Madrid 28033, Spain

来源：

CEMENT AND CONCRETE RESEARCH | 2003年 / 33卷 / 09期

关键词：

hydrothermal; hydration products; fly ash; cement manufacture;

D O I：

10.1016/S0008-8846(03)00085-1

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effect of hydrothermal treatment on the pozzolanic reaction of two kinds of Spanish fly ashes from coal combustion (ASTM class F) is discussed. Characterization of the compounds formed as a result of hydrothermal treatment and the changes provoked in the starting fly ashes were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and infrared (IR) spectroscopy. alpha-C2SH, CSH gel, different solid solutions of katoites (the cubic crystallographic variety of hydrogamets series (C(3)ASH(4))) and a mixed oxide (CaFe2O4) were formed depending on the kind of fly ash. The hydrated compounds are precursors of a new kind of low-energy cement called fly ash belite cement (FABC); besides, they have potential properties to intercalate toxic ions and therefore can be used as immobilization systems of these ions. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：1399 / 1405

页数：7

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