Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions
| dc.contributor.author | Temuujin, Jadambaa | |
| dc.contributor.author | Minjigmaa, A. | |
| dc.contributor.author | Lee, Melissa | |
| dc.contributor.author | Chen-Tan, Nigel | |
| dc.contributor.author | Van Riessen, Arie | |
| dc.date.accessioned | 2017-01-30T13:29:36Z | |
| dc.date.available | 2017-01-30T13:29:36Z | |
| dc.date.created | 2012-03-15T20:01:01Z | |
| dc.date.issued | 2011 | |
| dc.identifier.citation | Temuujin, J. and Minjigmaa, A. and Lee, M. and Chen-tan, N. and van Riessen, A. 2011. Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions. Cement and Concrete Composites. 33: pp. 1086-1091. | |
| dc.identifier.uri | http://hdl.handle.net/20.500.11937/32178 | |
| dc.identifier.doi | 10.1016/j.cemconcomp.2011.08.008 | |
| dc.description.abstract |
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. | |
| dc.publisher | Elsevier BV | |
| dc.subject | Chemical attack | |
| dc.subject | Phase transformation | |
| dc.subject | Fly ash | |
| dc.subject | Calcination | |
| dc.subject | Geopolymers | |
| dc.title | Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions | |
| dc.type | Journal Article | |
| dcterms.source.volume | 33 | |
| dcterms.source.startPage | 1086 | |
| dcterms.source.endPage | 1091 | |
| dcterms.source.issn | 09589465 | |
| dcterms.source.title | Cement and Concrete Composites | |
| curtin.department | Department of Imaging and Applied Physics | |
| curtin.accessStatus | Fulltext not available |