Optimising ambient setting Bayer derived fly ash geopolymers
The Bayer process utilises high concentrations of caustic and elevated temperature to liberate alumina from bauxite, for the production of aluminium and other chemicals. Within Australia, this process results in 40 million tonnes of mineral residues (Red mud) each year. Over the same period, the ene...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
mdpi
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/28639 |
| _version_ | 1848752590556233728 |
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| author | Jamieson, Evan Kealley, Cat Van Riessen, Arie Hart, Robert D. |
| author_facet | Jamieson, Evan Kealley, Cat Van Riessen, Arie Hart, Robert D. |
| author_sort | Jamieson, Evan |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The Bayer process utilises high concentrations of caustic and elevated temperature to liberate alumina from bauxite, for the production of aluminium and other chemicals. Within Australia, this process results in 40 million tonnes of mineral residues (Red mud) each year. Over the same period, the energy production sector will produce 14 million tonnes of coal combustion products (Fly ash). Both industrial residues require impoundment storage, yet combining some of these components can produce geopolymers, an alternative to cement. Geopolymers derived from Bayer liquor and fly ash have been made successfully with a compressive strength in excess of 40 MPa after oven curing. However, any product from these industries would require large volume applications with robust operational conditions to maximise utilisation. To facilitate potential unconfined large-scale production, Bayer derived fly ash geopolymers have been optimised to achieve ambient curing. Fly ash from two different power stations have been successfully trialled showing the versatility of the Bayer liquor-ash combination for making geopolymers. |
| first_indexed | 2025-11-14T08:11:02Z |
| format | Journal Article |
| id | curtin-20.500.11937-28639 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:11:02Z |
| publishDate | 2016 |
| publisher | mdpi |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-286392017-09-13T15:18:09Z Optimising ambient setting Bayer derived fly ash geopolymers Jamieson, Evan Kealley, Cat Van Riessen, Arie Hart, Robert D. The Bayer process utilises high concentrations of caustic and elevated temperature to liberate alumina from bauxite, for the production of aluminium and other chemicals. Within Australia, this process results in 40 million tonnes of mineral residues (Red mud) each year. Over the same period, the energy production sector will produce 14 million tonnes of coal combustion products (Fly ash). Both industrial residues require impoundment storage, yet combining some of these components can produce geopolymers, an alternative to cement. Geopolymers derived from Bayer liquor and fly ash have been made successfully with a compressive strength in excess of 40 MPa after oven curing. However, any product from these industries would require large volume applications with robust operational conditions to maximise utilisation. To facilitate potential unconfined large-scale production, Bayer derived fly ash geopolymers have been optimised to achieve ambient curing. Fly ash from two different power stations have been successfully trialled showing the versatility of the Bayer liquor-ash combination for making geopolymers. 2016 Journal Article http://hdl.handle.net/20.500.11937/28639 10.3390/ma9050392 mdpi fulltext |
| spellingShingle | Jamieson, Evan Kealley, Cat Van Riessen, Arie Hart, Robert D. Optimising ambient setting Bayer derived fly ash geopolymers |
| title | Optimising ambient setting Bayer derived fly ash geopolymers |
| title_full | Optimising ambient setting Bayer derived fly ash geopolymers |
| title_fullStr | Optimising ambient setting Bayer derived fly ash geopolymers |
| title_full_unstemmed | Optimising ambient setting Bayer derived fly ash geopolymers |
| title_short | Optimising ambient setting Bayer derived fly ash geopolymers |
| title_sort | optimising ambient setting bayer derived fly ash geopolymers |
| url | http://hdl.handle.net/20.500.11937/28639 |