Natural radioactivity of barite concrete shields containing commonly used supplementary materials

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dc.authoridAndic Cakir, Ozge/0000-0001-5662-3555
dc.authoridCanbaz Ozturk, Buket/0000-0001-5761-5901
dc.authoridGokce, H. Suleyman/0000-0002-6978-0135
dc.contributor.authorGokce, H. S.
dc.contributor.authorOzturk, B. Canbaz
dc.contributor.authorCam, N. F.
dc.contributor.authorAndic-Cakir, O.
dc.date.accessioned2024-10-04T18:52:31Z
dc.date.available2024-10-04T18:52:31Z
dc.date.issued2020
dc.departmentBayburt Üniversitesien_US
dc.description.abstractThe recycling of hazardous materials within new composites has a sustainable importance as it contributes on the reduction of high radionuclide concentrations. In this study, the effect of cementitious materials i.e. viscosity modifier, silica fume and fly ash on the Ra-226, Th-232 and K-40 activity levels of barite concrete shields was researched by using different mixing compositions in terms of binder content, w/b ratio and the amount of supplementary cementitious materials. In comparison to cement, silica fume and fly ash used in the production of concrete shields were found to have significantly higher activity levels of K-40, as well as Ra-226, Th-232 and K-40, respectively. The Ra-226, Th-232 and K-40 activity levels of concrete shields range between 2.2 and 20.7 Bq kg(-1); 2.6 and 7.0 Bq kg(-1); 51.5 and 89.3 Bq kg(-1), respectively. These activity values were found similar or less than those of building materials in the world. These satisfactory results are mostly caused by the barite source which has lower radioactivity levels. The concrete mixture details used in the study caused significant variation in the natural radioactivity of barite concrete shields. The introduction of silica fume which has high K-40 activity levels and fly ash with high Ra-226, Th-232 and K-40 activity levels compared to cement and barite aggregate, significantly increased the radiological hazard parameters, although all results were found to be below the limits recommended by international reports. In conclusion. Ra-226 activity levels of the concrete shields were significantly increased (up to 8.4 times) by the variation of mix design parameters used in comparison with concrete mixtures that have the least Ra-226 activity level. The Th-232 and K-40 activity levels were as well increased in relatively less amounts (1.7 and 0.73 times higher, respectively). (C) 2019 Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.conbuildmat.2019.117569
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.scopus2-s2.0-85074879806en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.conbuildmat.2019.117569
dc.identifier.urihttp://hdl.handle.net/20.500.12403/3514
dc.identifier.volume236en_US
dc.identifier.wosWOS:000514758800011en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofConstruction and Building Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectNatural radioactivityen_US
dc.subjectBarite concrete shieldsen_US
dc.subjectRecycling radioactive by-productsen_US
dc.subjectViscosity modifieren_US
dc.subjectSilica fumeen_US
dc.subjectFly ashen_US
dc.titleNatural radioactivity of barite concrete shields containing commonly used supplementary materialsen_US
dc.typeArticleen_US

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