Characterization of various fly ashes for preparation of geopolymers with advanced applications
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Fly ashes from different power stations in Australia (Collie, Eraring, Tarong) and Mongolia (4th thermal power station, Ulaanbaatar city) have been characterized by various techniques. It was determined that the Australian fly ashes are class F while the Mongolian fly ashes are class C. Due to their chemical and mineralogical differences, the fly ashes behaved differently when alkali activated to make geopolymers. The influence of various parameters on the preparation of geopolymers have been investigated and the results are used to establish a procedure for the routine manufacture of alkaline activated products. The applicability of using fly ash for building structural elements, corrosion resistant and thermally resistant materials will be presented.
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Van Riessen, Arie; Chen-Tan, Nigel (2013)This paper follows on from Beneficiation of Collie fly ash for synthesis of geopolymer: Part 1 – Beneficiation. In Part 1 beneficiation of fly ash was conducted in a three stage procedure using sieving, milling and magnetic ...
Van Riessen, Arie; Jamieson, E.; Kealley, Catherine; Hart, Robert; Williams, Ross (2013)Previously, caustic residues such as red mud and sodium oxalate have been used to provide filler and as a supplementary source of alkali for geopolymers. However, rather than incorporation of dilute alkali residues within ...
Hardjito, Djwantoro (2005)The use of Portland cement in concrete construction is under critical review due to high amount of carbon dioxide gas released to the atmosphere during the production of cement. In recent years, attempts to increase the ...