Microstructural examination of the effect of elevated temperature on the concrete containing clinoptilolite

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dc.authorid0000-0003-1033-5819
dc.authorid0000-0002-4448-2393
dc.contributor.authorAkcaozoglu, Kubilay
dc.contributor.authorFener, Mustafa
dc.contributor.authorAkcaozoglu, Semiha
dc.contributor.authorOcal, Recep
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2014
dc.departmentNiğde ÖHÜ
dc.description.abstractIn this study, the effect of elevated temperature on the properties of concrete containing clinoptilolite was investigated by microscopic analyses. For this purpose, seven different mixtures were prepared (the control mixture and six mixtures including 5%, 10%, 15%, 20%, 30% and 40% clinoptilolite by weight). The water binder (w/b) ratio used in the mixtures was 0.475. The dry unit weights, water absorption ratios, porosity ratios, compressive strengths and thermal conductivity coefficients of the mixtures were measured. In addition the specimens exposed to elevated temperatures of 250, 500,750 and 1000 degrees C. Two different cooling methods were used (slow cooling and fast cooling). The residual compressive strengths of the specimens which were exposed to elevated temperatures were measured. In addition the mineral and texture changes of the specimens were examined by using plane polarized microscope. Test results indicated that, clinoptilolite substitution decreased the compressive strength of the specimens in early days, but increased at later days. The positive effects were observed about clinoptilolite substitution on the residual compressive strength of the specimens. It was observed from microscopic analyses that, as the amount of clinoptilolite increased in the mixtures, aggregates were less affected from elevated temperatures. Fast cooling (FC) method resulted in strength losses when compared to slow cooling (SC) method. Additionally, clinoptilolite substitution decreased the thermal conductivity coefficient of the concrete. (C) 2014 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipNigde University Scientific Research and Projects Unit [FEB2013/24]
dc.description.sponsorshipThe authors would like thank Nigde University Scientific Research and Projects Unit that supported the present work (Project number: FEB2013/24).
dc.identifier.doi10.1016/j.conbuildmat.2014.09.023
dc.identifier.endpage325
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.scopus2-s2.0-84907982117
dc.identifier.scopusqualityQ1
dc.identifier.startpage316
dc.identifier.urihttps://dx.doi.org/10.1016/j.conbuildmat.2014.09.023
dc.identifier.urihttps://hdl.handle.net/11480/4087
dc.identifier.volume72
dc.identifier.wosWOS:000345723500036
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherELSEVIER SCI LTD
dc.relation.ispartofCONSTRUCTION AND BUILDING MATERIALS
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectClinoptilolite
dc.subjectConcrete
dc.subjectElevated temperature
dc.subjectCompressive strength
dc.subjectThermal conductivity
dc.subjectPolarized microscope analysis
dc.subjectMicrostructure
dc.titleMicrostructural examination of the effect of elevated temperature on the concrete containing clinoptilolite
dc.typeArticle

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