Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications
Fly ash characteristics cannot be assumed to be constant between power stations as they are highly dependent on the coal source and burning conditions. It is critical to understand the characteristics of fly ash in order to produce geopolymers suitable for high temperature applications. We report on...
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| Format: | Journal Article |
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Elsevier S.A.
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/45066 |
| _version_ | 1848757179108032512 |
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| author | Rickard, William Williams, Ross Temuujin, Jadambaa van Riessen, Arie |
| author_facet | Rickard, William Williams, Ross Temuujin, Jadambaa van Riessen, Arie |
| author_sort | Rickard, William |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Fly ash characteristics cannot be assumed to be constant between power stations as they are highly dependent on the coal source and burning conditions. It is critical to understand the characteristics of fly ash in order to produce geopolymers suitable for high temperature applications. We report on the characterisation of fly ash from three Australian power stations in terms of elemental composition, phase composition, particle size, density and morphology. Geopolymers were synthesised from each of the fly ashes using sodium silicate and sodium aluminate solutions to achieve a range of Si:Al compositional ratios. Mechanical properties of geopolymer binders are presented and the effect of the source fly ash characteristics on the hardened product is discussed, as well as implications for high temperature applications. It was found that the twenty eight day strength of geopolymers is largely dependent on the sub 20m size fraction of the fly ash. Strength loss after high temperature exposure was found to be dependent on the concentration of iron in the fly ash precursor and the Si:Al ratio of the geopolymer mixture |
| first_indexed | 2025-11-14T09:23:58Z |
| format | Journal Article |
| id | curtin-20.500.11937-45066 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:23:58Z |
| publishDate | 2011 |
| publisher | Elsevier S.A. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-450662017-09-13T16:09:09Z Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications Rickard, William Williams, Ross Temuujin, Jadambaa van Riessen, Arie Fly ash Geopolymer Thermal properties Fly ash characteristics cannot be assumed to be constant between power stations as they are highly dependent on the coal source and burning conditions. It is critical to understand the characteristics of fly ash in order to produce geopolymers suitable for high temperature applications. We report on the characterisation of fly ash from three Australian power stations in terms of elemental composition, phase composition, particle size, density and morphology. Geopolymers were synthesised from each of the fly ashes using sodium silicate and sodium aluminate solutions to achieve a range of Si:Al compositional ratios. Mechanical properties of geopolymer binders are presented and the effect of the source fly ash characteristics on the hardened product is discussed, as well as implications for high temperature applications. It was found that the twenty eight day strength of geopolymers is largely dependent on the sub 20m size fraction of the fly ash. Strength loss after high temperature exposure was found to be dependent on the concentration of iron in the fly ash precursor and the Si:Al ratio of the geopolymer mixture 2011 Journal Article http://hdl.handle.net/20.500.11937/45066 10.1016/j.msea.2011.01.005 Elsevier S.A. restricted |
| spellingShingle | Fly ash Geopolymer Thermal properties Rickard, William Williams, Ross Temuujin, Jadambaa van Riessen, Arie Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications |
| title | Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications |
| title_full | Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications |
| title_fullStr | Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications |
| title_full_unstemmed | Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications |
| title_short | Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications |
| title_sort | assessing the suitability of three australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications |
| topic | Fly ash Geopolymer Thermal properties |
| url | http://hdl.handle.net/20.500.11937/45066 |