Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions
Acid and alkaline resistance of class F fly ash based geopolymer pastes has been investigated. As prepared geopolymers showed high solubility in both strong alkali and acid solutions. Calcination of the fly ash based geopolymers at 600 C resulted in a decrease of amorphous component from 63.4 to 61....
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier BV
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/32178 |
| _version_ | 1848753589345845248 |
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| author | Temuujin, Jadambaa Minjigmaa, A. Lee, Melissa Chen-Tan, Nigel Van Riessen, Arie |
| author_facet | Temuujin, Jadambaa Minjigmaa, A. Lee, Melissa Chen-Tan, Nigel Van Riessen, Arie |
| author_sort | Temuujin, Jadambaa |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Acid and alkaline resistance of class F fly ash based geopolymer pastes has been investigated. As prepared geopolymers showed high solubility in both strong alkali and acid solutions. Calcination of the fly ash based geopolymers at 600 C resulted in a decrease of amorphous component from 63.4 to 61.6 wt.%. However, the solubility of the Al, Si and Fe ions in 14 M NaOH and 18% HCl after 5 days immersion decreased from 1.3 to 16-fold in comparison to as prepared geopolymer samples. Calcination of the geopolymers also resulted in a 30% reduction in compressive strength. Acid and alkali resistance of the geopolymers investigated strongly depends on mineralogical composition change of the calcined geopolymer. Partial crystallisation of non-reacted fly ash particles in the geopolymer decreases its solubility in acid and alkali solutions. |
| first_indexed | 2025-11-14T08:26:55Z |
| format | Journal Article |
| id | curtin-20.500.11937-32178 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:26:55Z |
| publishDate | 2011 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-321782017-09-13T16:09:22Z Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions Temuujin, Jadambaa Minjigmaa, A. Lee, Melissa Chen-Tan, Nigel Van Riessen, Arie Chemical attack Phase transformation Fly ash Calcination Geopolymers Acid and alkaline resistance of class F fly ash based geopolymer pastes has been investigated. As prepared geopolymers showed high solubility in both strong alkali and acid solutions. Calcination of the fly ash based geopolymers at 600 C resulted in a decrease of amorphous component from 63.4 to 61.6 wt.%. However, the solubility of the Al, Si and Fe ions in 14 M NaOH and 18% HCl after 5 days immersion decreased from 1.3 to 16-fold in comparison to as prepared geopolymer samples. Calcination of the geopolymers also resulted in a 30% reduction in compressive strength. Acid and alkali resistance of the geopolymers investigated strongly depends on mineralogical composition change of the calcined geopolymer. Partial crystallisation of non-reacted fly ash particles in the geopolymer decreases its solubility in acid and alkali solutions. 2011 Journal Article http://hdl.handle.net/20.500.11937/32178 10.1016/j.cemconcomp.2011.08.008 Elsevier BV restricted |
| spellingShingle | Chemical attack Phase transformation Fly ash Calcination Geopolymers Temuujin, Jadambaa Minjigmaa, A. Lee, Melissa Chen-Tan, Nigel Van Riessen, Arie Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions |
| title | Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions |
| title_full | Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions |
| title_fullStr | Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions |
| title_full_unstemmed | Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions |
| title_short | Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions |
| title_sort | characterisation of class f fly ash geopolymer pastes immersed in acid and alkaline solutions |
| topic | Chemical attack Phase transformation Fly ash Calcination Geopolymers |
| url | http://hdl.handle.net/20.500.11937/32178 |