Workability and strength of coarse high calcium fly ash geopolymer

被引：635

作者：

Chindaprasirt, P. ^{[1
]}

Chareerat, T.

Sirivivatnanon, V.

机构：

[1] Khon Kaen Univ, Dept Civil Engn, Khon Kaen 40002, Thailand

[2] CSIRO Mfg & Infrastruct Technol, N Ryde, NSW 2113, Australia

来源：

CEMENT & CONCRETE COMPOSITES | 2007年 / 29卷 / 03期

关键词：

geopolymer; high calcium fly ash; lignite; workability; strength;

D O I：

10.1016/j.cemconcomp.2006.11.002

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this paper, the basic properties viz., workability and strength of geopolymer mortar made from coarse lignite high calcium fly ash were investigated. The geopolymer was activated with sodium hydroxide (NaOH), sodium silicate and heat. The results revealed that the workable flow of geopolymer mortar was in the range of 110 +/- 5%- 135 +/- 5% and was dependent on the ratio by mass of sodium silicate to NaOH and the concentration of NaOH. The obtained compressive strength was in the range of 10-65 MPa. The optimum sodium silicate to NaOH ratio to produce high strength geopolymer was 0.67-1.0. The concentration variation of NaOH between 10 M and 20 M was found to have a small effect on the strength. The geopolymer samples with high strength were obtained with the following practices: the delay time after moulding and before subjecting the sample to heat was 1 h and the optimum curing temperature in the oven was 75 degrees C with the curing duration of not less than two days. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：224 / 229

页数：6

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