Investigation of geopolymers containing fly ash and ground-granulated blast-furnace slag blended by amorphous ratios

被引：47

作者：

Lau, Chee Keong ^{[1
]}

Rowles, Matthew R. ^{[2
]}

Parnham, Glenn N. ^{[1
]}

Htut, Trevor ^{[1
]}

Ng, Tian Sing ^{[1
]}

机构：

[1] Curtin Univ, Sch Civil & Mech Engn, Perth, WA, Australia

[2] Curtin Univ, John de Laeter Ctr, Perth, WA, Australia

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 222卷

关键词：

Fly ash; Ground-granular blast furnace slag; Geopolymer; Amorphous material; X-ray diffraction; METAKAOLIN-BASED GEOPOLYMERS; SODIUM-SILICATE ACTIVATION; MICROSTRUCTURAL DEVELOPMENT; COMPRESSIVE STRENGTH; PHASE EVOLUTION; OPTIMIZATION; WORKABILITY; DIFFRACTION; PERFORMANCE; REACTIVITY;

D O I：

10.1016/j.conbuildmat.2019.06.198

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A new amorphous phase mix design framework had been successfully developed in consideration of calcium content through the combination of ground-granular blast-furnace slag (GGBFS) in fly ash (FA) blended geopolymers. The new framework has been developed considering the amorphous silicon, aluminium, sodium and calcium containing phases of the aluminosilicate sources to increase geopolymerisation reactivity and compressive strength. By utilising this new framework, this study found that the optimal amorphous Si/Al ratio of FA- and GGBFS-blended geopolymers are between 2.3 and 3.1. At 40-50% of FA replacement with GGBFS, it had been observed that blended geopolymers are able to achieve the majority of its 28 days compressive strength at 7 days. To account for the effect of calcium content, a new amorphous ratio, (Na + 2Ca)/Al, is proposed, with an optimal ratio of between 3.2 and 3.4. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：731 / 737

页数：7

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