Characterization study of geopolymer concretes fabricated with clinker aggregates

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dc.authorid0000-0001-9193-624Xen_US
dc.contributor.authorÖz, Ali
dc.contributor.authorBekem Kara, İlknur
dc.contributor.authorBayrak, Barış
dc.contributor.authorKavaz, Esra
dc.contributor.authorKaplan, Gökhan
dc.contributor.authorAydın, Abdulkadir Cüneyt
dc.date.accessioned2023-06-01T11:38:10Z
dc.date.available2023-06-01T11:38:10Z
dc.date.issued2023
dc.departmentAÇÜ, Borçka Acarlar Meslek Yüksekokulu, İnşaat Teknolojisi Bölümüen_US
dc.description.abstractGeopolymers are a new generation of building material that has recently been popular in reducing carbon emissions. As a result of its amorphous alumina-silicate-based reaction product, it has many superior properties. This study investigated the mechanical and physical properties and high-temperature resistance of groundgranulated blast furnace slag and metakaolin-based geopolymer concrete fabricated with clinker aggregates produced in a short curing time (8 h). In alkali activators, the sodium silicate to sodium hydroxide (SS/SH) mass ratios were 2, 2.25, 2.5 and 2.75. Two curing methods were used, namely ambient (25 ?C) and oven curing (80 ?C). The observed unit weights vary between 2275–2392 kg/m3 for the samples of the geopolymeric composites. Porosity and water absorption vary between 4.92 and 8.84% and 3.58–7.26%, respectively. The heat curing application decreased the mixtures’ water absorption, unit weight, and porosity values. The compressive strength of the samples subject to ambient curing varied between 39.2 and 59.8 MPa. Withal, the samples cured at 80 ?C for 8 h were between 66.9 and 112.4 MPa. The increased SS/SH ratio also increased the observed strength values. Capillary water absorption of all samples is below 0.6 kg/m2 . Heat-cured geopolymers decreased capillary water absorption to 0.1 kg/m2 . The weight loss after high temperature decreased as the SS/SH ratio increased. The N-AS-H gel in the zeolitic structure was observed in SEM analysis. The FT-IR analysis visualized the carbonation in the heat-cured mixtures. As a result, over 100 MPa compressive strength values were observed with the clinker aggregates at 80 ?C after 8 h of curing time. Withal, a high-temperature refractory composite was developed with the clinker aggregates. Moreover, the nuclear radiation shielding abilities of geopolymer concretes were investigated experimentally. The gamma shielding parameters of the samples were evaluated by transmission measurements in the range of 0.081–0.661 keV. Also, neutron dose measurements were performed, and the samples produced as neutron attenuator capacity was evaluated. The radiation shielding capabilities were improved slightly with increasing sodium silicate solution content.
dc.identifier.citationÖz, A., Kara, İ. B., Bayrak, B., Kavaz, E., Kaplan, G., & Aydın, A. C. (2023). Characterization study of geopolymer concretes fabricated with clinker aggregates. Construction and Building Materials, 384, 131461.en_US
dc.identifier.doi10.1016/j.conbuildmat.2023.131461
dc.identifier.issue27en_US
dc.identifier.urihttp://dx.doi.org/https://doi.org/10.1016/j.conbuildmat.2023.131461
dc.identifier.urihttps://hdl.handle.net/11494/4893
dc.identifier.volume384en_US
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.institutionauthorBekem Kara, İlknur
dc.language.isoenen_US
dc.relation.ispartofConstruction and Building Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectClinker aggregateen_US
dc.subjectAlkali activatorsen_US
dc.subjectSustainabilityen_US
dc.subjectMetakaolinen_US
dc.subjectHigh-strength geopolymeren_US
dc.subjectShieldingen_US
dc.titleCharacterization study of geopolymer concretes fabricated with clinker aggregatesen_US
dc.typeArticle

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