Hardening mechanisms of an alkaline-activated class F fly ash

被引：179

作者：

Xie, ZH

Xi, YP

机构：

[1] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA

[2] China Bldg Mat Acad, Beijing, Peoples R China

来源：

CEMENT AND CONCRETE RESEARCH | 2001年 / 31卷 / 09期

关键词：

alkali-activated cement; fly ash;

D O I：

10.1016/S0008-8846(01)00571-3

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The hardening mechanism of a paste composed of a low calcium fly ash and alkali was investigated. It was found that a fraction of fly ash reacted with water-glass and formed amorphous or low-ordered crystalline compounds of the type of Na2O-Al2O3-SiO2, after the paste was cured at 60 degreesC for 24 h. For the water-glass with a modulus of 1.64, the strength of the paste is mainly attributed to the gel-like reaction products that bind the particles of fly ash together. When the modulus is decreased to 1.0, crystalline sodium silicate is formed in the matrix, which helps to achieve high strengths. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1245 / 1249

页数：5

共 8 条

[1]

[Anonymous], P PCI FHWA INT S HPC

[2]

[Anonymous], 1965, IND CHEM

[3] PARTICLE MORPHOLOGIES IN FLY-ASH [J].