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dc.contributor.authorNath, P.
dc.contributor.authorSarker, Prabir
dc.date.accessioned2017-01-30T14:26:28Z
dc.date.available2017-01-30T14:26:28Z
dc.date.created2016-12-18T19:31:11Z
dc.date.issued2017
dc.identifier.citationNath, P. and Sarker, P. 2017. Flexural strength and elastic modulus of ambient-cured blended low-calcium fly ash geopolymer concrete. Construction and Building Materials. 130: pp. 22-31.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/38830
dc.identifier.doi10.1016/j.conbuildmat.2016.11.034
dc.description.abstract

Fly ash geopolymer is an emerging alternative binder with low environmental impact and potential to enhance sustainability of concrete construction. Most previous works examined the properties of fly ash-based geopolymer concrete (GPC) subjected to curing at elevated temperature. To extend the use of GPC in cast-in-situ applications, this paper investigated the properties of blended low-calcium fly ash geopolymer concrete cured in ambient condition. Geopolymer concretes were produced using low-calcium fly ash with a small percentage of additive such as ground granulated blast furnace slag (GGBFS), ordinary Portland cement (OPC) or hydrated lime to enhance early age properties. Samples were cured in room environment (18–23 °C and 70 ± 10% relative humidity) until tested. The results show that, density of hardened GPC mixtures is similar to that of normal-weight OPC concrete. Inclusion of additives enhanced the mechanical strengths significantly as compared to control concrete. For similar compressive strength, flexural strength of ambient cured GPC was higher than that of OPC concrete. Modulus of elasticity of ambient cured GPC tend to be lower than that of OPC concrete of similar grade. Prediction of elastic modulus by Standards and empirical equations for OPC concrete were found not conservative for GPC. Thus, an equation for conservative prediction of elastic modulus of GPC is proposed.

dc.publisherElsevier BV
dc.titleFlexural strength and elastic modulus of ambient-cured blended low-calcium fly ash geopolymer concrete
dc.typeJournal Article
dcterms.source.volume130
dcterms.source.startPage22
dcterms.source.endPage31
dcterms.source.issn0950-0618
dcterms.source.titleConstruction and Building Materials
curtin.departmentDepartment of Civil Engineering
curtin.accessStatusOpen access


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