Effects of Ms modulus, Na concentration and fly ash content on properties of vapour-cured geopolymer mortars exposed to high temperatures

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dc.contributor.authorSaridemir, Mustafa
dc.contributor.authorcelikten, Serhat
dc.date.accessioned2024-11-07T13:31:22Z
dc.date.available2024-11-07T13:31:22Z
dc.date.issued2023
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractThis study aimed to analyse the effects of silica modulus (Ms modulus), Na concentration and fly ash (FA) content on the mechanical and microstructural properties of vapour-cured (at 75 degrees C for 8 h) ground granulated blast furnace slag (GGBFS)-based geopolymer mortars (GPMs). For this purpose, 27 different GPM mixtures with 0, 25 and 50 % percentages of FA were produced. In the mixtures, the sodium silicate and NaOH were used for the mortar production at three different Ms of 0.25, 0.5 and 1.0, and the amount of activators was determined to provide 3, 6 and 9 % Na concentration as a percentage of total precursor (GGBFS or GGBFS + FA). Experimental results showed that the optimum Ms modulus was 0.5 for the vapour-cured mortars made with 0 % FA and was 1.0 for the vapour-cured mortars produced with 25 and 50 % FA. The highest flexural strength (Fs) and compressive strength (Cs) values were achieved on the vapour-cured mortars made with 6 % Na, and 50 % FA. Besides, the Fs/Cs ratio of vapour-cured mortars were improved with increasing FA content. Scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS) and polarized light microscopy (PLM) analyses showed that there were alterations and deteriorations in the microstructure of vapour-cured GPM matrixes exposed to high temperatures.
dc.description.sponsorshipOmer Halisdemir University [FEB2018/10-BAGEP]
dc.description.sponsorshipThe study is underpinned with Nigde project Investigation of the properties of alkali-activated lightweight concretes, project code FEB2018/10-BAGEP. Omer Halisdemir University
dc.identifier.doi10.1016/j.conbuildmat.2022.129868
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.scopus2-s2.0-85143537000
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.conbuildmat.2022.129868
dc.identifier.urihttps://hdl.handle.net/11480/14809
dc.identifier.volume363
dc.identifier.wosWOS:000897115900003
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
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.snmzKA_20241106
dc.subjectBlast furnace slag
dc.subjectFly ash
dc.subjectGeopolymer
dc.subjectVapour curing
dc.subjectHigh temperature
dc.titleEffects of Ms modulus, Na concentration and fly ash content on properties of vapour-cured geopolymer mortars exposed to high temperatures
dc.typeArticle

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