Microstructural Analyses of High Strength Concretes Containing Metakaolin at High Temperatures

dc.authoridCELIKTEN, SERHAT/0000-0001-8154-7590
dc.authoridSaridemir, Mustafa/0000-0002-7490-6572
dc.contributor.authorSaridemir, Mustafa
dc.contributor.authorSevercan, Metin Hakan
dc.contributor.authorCiflikli, Murat
dc.contributor.authorCelikten, Serhat
dc.date.accessioned2024-11-07T13:24:44Z
dc.date.available2024-11-07T13:24:44Z
dc.date.issued2017
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractIn this study, the effects of high temperatures on the mechanical and microstructural properties of high strength concretes (HSCs) containing metakaolin (MK) are investigated. For this purpose, the concrete mixtures containing MK were produced with a water-binder ratio of 0.2. The mechanical properties of these concretes at 25, 250, 500 and 750 degrees C temperatures were determined. Besides, the effect of high temperature on the microstructural properties of cementitious matrix, interfacial transition zone between cement and aggregates, and aggregates of concretes were inspected by X-ray diffraction, scanning electron microscope and plane polarized transmitted light (PPTL) analyses. The results indicate that the ultrasound pulse velocity (U-pv), compressive strength (f(c)), flexural strength (f(fs)) and splitting tensile strength (f(sts)) values of these concretes decrease with the increasing of the high temperature especially after 250 degrees C. The heated concrete specimens were also examined at both macro- and micro-scales to determine the discoloration, alteration and cracks of HSC at different temperatures. PPTL analyses show that increasing temperature causes impairing of interfaces between aggregate particles and cementitious materials. The results also show that the partial replacement of 10 % MK with cement has the best performance on the mechanical properties of HSC.
dc.identifier.doi10.1007/s40999-016-0081-7
dc.identifier.endpage285
dc.identifier.issn1735-0522
dc.identifier.issn2383-3874
dc.identifier.issue2A
dc.identifier.scopus2-s2.0-85013230634
dc.identifier.scopusqualityQ2
dc.identifier.startpage273
dc.identifier.urihttps://doi.org/10.1007/s40999-016-0081-7
dc.identifier.urihttps://hdl.handle.net/11480/14266
dc.identifier.volume15
dc.identifier.wosWOS:000394567600014
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofInternational Journal of Civil Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241106
dc.subjectHigh strength
dc.subjectMicrostructures
dc.subjectHigh temperature
dc.subjectInterfacial transition zone
dc.titleMicrostructural Analyses of High Strength Concretes Containing Metakaolin at High Temperatures
dc.typeArticle

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