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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...

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Autores principales: Jamieson, Evan, Kealley, Catherine S., van Riessen, Arie, Hart, Robert D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5503037/
https://www.ncbi.nlm.nih.gov/pubmed/28773513
http://dx.doi.org/10.3390/ma9050392
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author Jamieson, Evan
Kealley, Catherine S.
van Riessen, Arie
Hart, Robert D.
author_facet Jamieson, Evan
Kealley, Catherine S.
van Riessen, Arie
Hart, Robert D.
author_sort Jamieson, Evan
collection PubMed
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.
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spelling pubmed-55030372017-07-28 Optimising Ambient Setting Bayer Derived Fly Ash Geopolymers Jamieson, Evan Kealley, Catherine S. van Riessen, Arie Hart, Robert D. Materials (Basel) Article 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. MDPI 2016-05-19 /pmc/articles/PMC5503037/ /pubmed/28773513 http://dx.doi.org/10.3390/ma9050392 Text en © 2016 by the authors; Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jamieson, Evan
Kealley, Catherine S.
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
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5503037/
https://www.ncbi.nlm.nih.gov/pubmed/28773513
http://dx.doi.org/10.3390/ma9050392
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