Effect of waste travertine powder on properties of rhyolitic tuff-based geopolymer

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dc.authoridtekin, ilker/0000-0001-7400-4790
dc.authoridValizadeh Kiamahalleh, Mohammad/0009-0005-8546-4801
dc.contributor.authorTekin, Ilker
dc.contributor.authorPekgoz, Mahfuz
dc.contributor.authorDirikolu, Irem
dc.contributor.authorKiamahalleh, Mohammad Valizadeh
dc.contributor.authorGholampour, Aliakbar
dc.contributor.authorGencel, Osman
dc.contributor.authorOzbakkaloglu, Togay
dc.date.accessioned2024-09-29T15:57:44Z
dc.date.available2024-09-29T15:57:44Z
dc.date.issued2024
dc.departmentKarabük Üniversitesien_US
dc.description.abstractThis investigation explores the potential of geopolymer technology as an eco-friendly substitute for conventional construction materials by emphasizing the innovative use of naturally occurring green rhyolitic tuff and repurposed travertine powder in geopolymer paste formulations. Replacement levels of tuff with travertine at 40 %, 45 %, and 50 %, along with an alkaline solution with a NaOH molarity range of 8.2 M-22.1 M, have been analyzed for their impact on flowability, water absorption, porosity, compressive strength, and unit weight of the geopolymers over curing periods of 2, 28, and 90 days. The flowability measurements show that adding 40 %, 45 %, and 50 % travertine leads to approximately 7 %, 31 %, and 31 % reductions in the flowability of the geopolymer, respectively. It is demonstrated that adding 40 % travertine significantly improves the geopolymers' compressive strength with an 11.5 M NaOH concentration, showing substantial increases of approximately 15.5, 9.0, and 2.4 times at the curing duration of 2, 28, and 90 days, respectively, relative to the geopolymer without travertine. As an optimum points, an 18.5 M NaOH and an 0.7 solution-to-powder ratio decrease the long-term apparent porosity and water absorption of the geopolymer without travertine by about 14 % and 19 % compared to those at the same solution-to-powder ratio with 11.5 M NaOH, respectively. Microscopic examinations were employed to validate the development of sodium aluminosilicate hydrate, calcium aluminosilicate hydrate, and calcium silicate hydrate gels, underscoring the advantageous contribution of the elevated CaO content in the travertine to the geopolymer matrix. This research not only highlights the environmental benefits of repurposing waste materials but also contributes to the development of more sustainable and durable geopolymer pastes, offering a promising approach to enhancing environmental stewardship in material science practices.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUEBITAK) ARDEB 1001 Project [217M431]en_US
dc.description.sponsorshipThis research received funding from the Scientific and Technological Research Council of Turkey (TUEBITAK) ARDEB 1001 Project No. 217M431.en_US
dc.identifier.doi10.1016/j.jobe.2024.110429
dc.identifier.issn2352-7102
dc.identifier.scopus2-s2.0-85201456127en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.jobe.2024.110429
dc.identifier.urihttps://hdl.handle.net/20.500.14619/4993
dc.identifier.volume96en_US
dc.identifier.wosWOS:001299650200001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofJournal of Building Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectGeopolymeren_US
dc.subjectRhyolitic tuffen_US
dc.subjectWaste travertineen_US
dc.subjectMicrostructureen_US
dc.subjectCompressive strengthen_US
dc.titleEffect of waste travertine powder on properties of rhyolitic tuff-based geopolymeren_US
dc.typeArticleen_US

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