Influence of calcium compounds on the mechanical properties of fly ash geopolymer pastes

被引：621

作者：

Temuujin, J. ^{[1
]}

van Riessen, A. ^{[1
]}

Williams, R. ^{[1
]}

机构：

[1] Curtin Univ Technol, Ctr Mat Res, Dept Imaging & Appl Phys, Perth, WA 6845, Australia

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 167卷 / 1-3期

关键词：

Fly ash; Geopolymer; Calcium compounds; Microstructure; Mechanical properties; COMPRESSIVE STRENGTH; SILICATE HYDRATE; ACTIVATION; MINERALS; WASTE; GEL;

D O I：

10.1016/j.jhazmat.2008.12.121

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The influence of calcium compounds (CaO and Ca(OH)(2)) on the mechanical properties of fly ash based geopolymers has been studied. Calcium compounds were substituted in fly ash at 1, 2 and 3 wt%, respectively. Curing of the geopolymers was performed at ambient temperature (20 degrees C) and 70 degrees C. Addition of calcium compounds as a fly ash substitute improved mechanical properties for the ambient temperature cured samples while decreasing properties for the 70 degrees C cured samples. Seven days compressive strength of the ambient temperature cured samples increased from 11.8 (2.9) to 22.8 (3.8) MPa and 29.2 (1.1) MPa for 3% CaO and 3% Ca(OH)(2) additions, respectively. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：82 / 88

页数：7

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