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dc.contributor.authorNath, Pradip
dc.contributor.authorSarker, Prabir
dc.contributor.editorVinh Dao and Peter Dux
dc.date.accessioned2017-01-30T10:38:41Z
dc.date.available2017-01-30T10:38:41Z
dc.date.created2015-10-15T09:23:22Z
dc.date.issued2013
dc.identifier.citationNath, P. and Sarker, P. 2013. Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition, in Dao, V. and Dux, P. (ed), Proceedings of the 26th Biennial National Conference of the Concrete Institute Australia: Understanding Concrete, Oct 16-18 2013. Gold Coast, QLD, Australia: Concrete Institute of Australia.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/4360
dc.description.abstract

Geopolymer is synthesized by activating alumino-silicate materials with an alkaline activator. The curing temperature has a significant effect on the setting and strength gain of geopolymers and curing is usually done at an elevated temperature. In addition to the curing temperature, the properties of geopolymer mixture are influenced by the type, chemical compositions and doses of alkaline activator solutions. The aim of this study is to investigate the effect of various mixture parameters of alkaline activator solution on the properties of fly ash based geopolymer mixture produced in ambient curing condition. Class F fly ash was used to prepare geopolymer mortars. Ordinary Portland cement was added as an additive with fly ash to enhance the early age properties of concrete in ambient curing condition (about 23oC and RH 60±10%). Fly ash was activated by a mixture of sodium silicate (SS) solution and sodium hydroxide (SH) solution. Three different types of SS were mixed with SH in different ratios (SS/SH = 1.5, 2.0, 2.5). The results indicate that, setting time and compressive strength of the OPC blended fly ash geopolymer mixture vary with the variation of chemical composition of alkaline activator solution. The critical molar ratios of geopolymer mixture were correlated with the properties of the mixtures. Generally, strength increased with the increase of Na2O/SiO2 and decrease of H2O/Na2O ratio.

dc.publisherConcrete Institute of Australia
dc.subjectAlkali activation
dc.subjectfly ash
dc.subjectsetting time
dc.subjectgeopolymer
dc.subjectambient curing
dc.titleEffect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition
dc.typeConference Paper
dcterms.source.titleConcrete 2013: Proceedings of the 26th Biennial National Conference of the Concrete Institute of Australia
dcterms.source.seriesConcrete 2013: Proceedings of the 26th Biennial National Conference of the Concrete Institute of Australia
dcterms.source.isbn9781877040733
dcterms.source.conferenceUnderstanding Concrete
dcterms.source.conference-start-dateOct 16 2013
dcterms.source.conferencelocationGold Coast, QLD, Australia
dcterms.source.placeNorth Sydney, NSW, Australia
curtin.departmentDepartment of Civil Engineering
curtin.accessStatusFulltext not available


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