Examination of mechanical properties and microstructure of alkali activated slag and slag-metakaolin blends exposed to high temperatures

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dc.authoridAkcaozoglu, Semiha/0000-0003-1033-5819
dc.authoridAtis, Cengiz Duran/0000-0003-3459-329X
dc.authoridBozkaya, Omer/0000-0002-8474-8600
dc.contributor.authorAkcaozoglu, Semiha
dc.contributor.authorCiflikli, Murat
dc.contributor.authorBozkaya, Omer
dc.contributor.authorAtis, Cengiz Duran
dc.contributor.authorUlu, Cuneyt
dc.date.accessioned2024-11-07T13:34:16Z
dc.date.available2024-11-07T13:34:16Z
dc.date.issued2022
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractThis paper reports an experimental study of the influence of elevated temperature on alkali activated slag (AAS) and slag-metakaolin (MK) systems. The residual compressive and flexural tensile strengths, ultrasonic pulse velocity (UPV) and porosity and water absorption ratios of AAS and AAS-MK composites after subjected to elevated temperatures of 200, 400, 600, 800, and 1000 degrees C were investigated. Two different procedures were applied for cooling the specimens. The changes in the microstructure of the composites after subjected to high temperature were examined with scanning electron microscope and X-ray diffraction. Test results reveal that depending on the increasing temperature, the residual compressive strength, flexural tensile strength, and UPV values of the specimens decreased, and porosity and water absorption ratios increased. The minimum strength results of AAS and AAS-MK specimens were observed at 800 and 600 degrees C, respectively. In particular, there have been significant changes in the internal structure of AAS and AAS-MK specimens exposed to 1000 degrees C and new reaction products were observed. Test results have shown that AAS specimens are a new alternative that can be developed for use in environments exposed to high temperatures. Since this new composite contains only slag binder and slag aggregate, it can be an economical product that use fully recycled material and these properties can increase the application areas of environmentally friendly material.
dc.description.sponsorshipNigde Omer Halisdemir Universitesi Scientific Research Projects Unit [FEB 2012/31]
dc.description.sponsorshipNigde Omer Halisdemir Universitesi Scientific Research Projects Unit, Grant/Award Number: FEB 2012/31
dc.identifier.doi10.1002/suco.202000080
dc.identifier.endpage1289
dc.identifier.issn1464-4177
dc.identifier.issn1751-7648
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85107402861
dc.identifier.scopusqualityQ1
dc.identifier.startpage1273
dc.identifier.urihttps://doi.org/10.1002/suco.202000080
dc.identifier.urihttps://hdl.handle.net/11480/15875
dc.identifier.volume23
dc.identifier.wosWOS:000660067100001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherErnst & Sohn
dc.relation.ispartofStructural Concrete
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241106
dc.subjectalkali activated composites
dc.subjectfire resistance
dc.subjectmechanical properties
dc.subjectmetakaolin
dc.subjectrecycling
dc.subjectslag
dc.titleExamination of mechanical properties and microstructure of alkali activated slag and slag-metakaolin blends exposed to high temperatures
dc.typeArticle

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