Utilization of waste Cappadocia earth as a natural pozzolan in alkali activation: A parametric study

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dc.authoridOzata, Serife/0000-0003-1993-7592|Akturk, Busra/0000-0003-1484-7758|Akturk, Busra/0000-0003-1484-7758;
dc.authorwosidOzata, Serife/ABG-9185-2020
dc.authorwosidAkturk, Busra/JCO-1851-2023
dc.authorwosidAkturk, Busra/AEZ-1900-2022
dc.authorwosidYuzer, Nabi/K-7571-2016
dc.contributor.authorOzata, Serife
dc.contributor.authorAkturk, Busra
dc.contributor.authorYuzer, Nabi
dc.date.accessioned2024-07-18T20:42:31Z
dc.date.available2024-07-18T20:42:31Z
dc.date.issued2022
dc.departmentİstanbul Bilgi Üniversitesien_US
dc.description.abstractThis study presents the investigation of the possible use of rock-cut carving waste earth in Cappadocia as a precursor in alkali activation. The Cappadocia waste earth was activated by sodium hydroxide (NH) and sodium silicate (WG). In addition, slaked lime (CH) was substituted as a calcium resource. The compressive strength development was determined and the reaction mechanisms were investigated through X-ray diffraction and Fourier transform infrared spectroscopy. It was found that different strength levels can be obtained, depending on the activator type and CH-substitution ratio. While WG-activated mixes presented higher early age values, NH-activated mixes presented higher values at further ages, i.e., ~17 MPa at 28 days. The CH substitution enhanced the compressive strength for both early and further ages, attributing to the available Ca2+ ions resulting in the formation of C-A-S-H gel. The XRD results showed that silicates group minerals prominent in control mixes, while C-A-S-H-like gel was the primary phase in CH-substituted mixes. N-A-S-H and other hydrated compounds were found in all mixes, responsible for strength increment. Moreover, secondary electron microscope images revealed a denser structure in WG-activated mixes. Results of energy dispersive spectroscopy and X-ray diffractions corroborated hydration products and alkali activation. The obtained results of this study depict that alkali-activated Cappadocia earth can be a feasible and alternative sustainable binder to be used as a structural material.en_US
dc.description.sponsorshipScientific and Technical Research Council of Turkey (TUBITAK) [118M321]; Yildiz Technical University [FDK-2018-3413]en_US
dc.description.sponsorshipThis research was supported by the Scientific and Technical Research Council of Turkey (TUBITAK) under grant number118M321 and benefited from a grant of Research Fund of the Yildiz Technical University, Project No.: FDK-2018-3413.en_US
dc.identifier.doi10.1016/j.conbuildmat.2022.127192
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.scopus2-s2.0-85127560721en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.conbuildmat.2022.127192
dc.identifier.urihttps://hdl.handle.net/11411/7311
dc.identifier.volume329en_US
dc.identifier.wosWOS:000788755600002en_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 Pozzolanen_US
dc.subjectAlkali-Activated Materialsen_US
dc.subjectGeopolymersen_US
dc.subjectCappadociaen_US
dc.subjectCompressive Strengthen_US
dc.subjectMicrostructureen_US
dc.subjectInorganic Polymers Geopolymersen_US
dc.subjectVolcanic Ashen_US
dc.subjectCompressive Strengthen_US
dc.subjectEngineering Propertiesen_US
dc.subjectStructural Characteristicsen_US
dc.subjectPortland-Cementen_US
dc.subjectSilica Modulusen_US
dc.subjectMicrostructureen_US
dc.subjectBinderen_US
dc.subjectMetakaolinen_US
dc.titleUtilization of waste Cappadocia earth as a natural pozzolan in alkali activation: A parametric studyen_US
dc.typeArticleen_US

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