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The properties of fly ash based geopolymer mortars made with dune sand
conference contribution
posted on 2012-11-14, 00:00 authored by E Hunter, A H Korayem,, Z Pan, W H Duan, X L Zhao, Frank CollinsFrank Collins, J SanjayanGeopolymer cement utilises industrial by-products and is associated with low CO2 emissions. The use of dune sand as fine aggregate could reduce the environmental impact of mining activities. The present study is to examine the feasibility of using dune sand in geopolymer-based construction materials. The geopolymer mortars made with dune sand (DSM) were prepared by using alkali activators of different cations
(Na, K and Na/K). In order to compare, the corresponding geopolymer mortars made with normal sand (NSM) were also prepared. It was found that dune sand has little influence on the strength of geopolymer mortars, especially for K based mortars. However, the alkali cation has significant influence on the compressive strength of geopolymer mortars. This influence was found to be correlated to porosity. Low compressive strength is associated with high porosity. For all investigated alkali cations, the tensile strengths of DSM compare favourably to those predicted by the relevant Standards for construction materials. Based on the experimental results, Australian dune sand can be used as fine aggregate for the production of geopolymer based construction materials.
(Na, K and Na/K). In order to compare, the corresponding geopolymer mortars made with normal sand (NSM) were also prepared. It was found that dune sand has little influence on the strength of geopolymer mortars, especially for K based mortars. However, the alkali cation has significant influence on the compressive strength of geopolymer mortars. This influence was found to be correlated to porosity. Low compressive strength is associated with high porosity. For all investigated alkali cations, the tensile strengths of DSM compare favourably to those predicted by the relevant Standards for construction materials. Based on the experimental results, Australian dune sand can be used as fine aggregate for the production of geopolymer based construction materials.
History
Event
ACUN-6 Composites and Nanocomposites in Civil, Offshore and Mining Infrastructure. International Composites Conference (6th : 2012 : Melbourne, Victoria)Series
ACUN International Composites ConferencePagination
399 - 404Publisher
ACUN-6 Monash UniversityLocation
Melbourne, VictoriaPlace of publication
Melbourne, Vic.Start date
2012-11-14End date
2012-11-16ISBN-13
978-0-646-58589-5Language
engPublication classification
E Conference publication; E1.1 Full written paper - refereedCopyright notice
2012, ACUN-6 Monash UniversityEditor/Contributor(s)
Y Bai, S Bandyopadhyay, X Zhao, R Singh, S RizkallaTitle of proceedings
ACUN-6 2012 : Proceedings of the 6th International Composites Conference on Composites and Nanocomposites in Civil, Offshore and Mining InfrastructureUsage metrics
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