Tea waste ash: Characterization, pozzolanic activity and effects on the fresh properties of cement pastes

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dc.contributor.authorBekem Kara, İlknur
dc.contributor.authorKara, Cuma
dc.date.accessioned2025-09-30T10:48:22Z
dc.date.available2025-09-30T10:48:22Z
dc.date.issued2025
dc.departmentAÇÜ, Borçka Acarlar Meslek Yüksekokulu, İnşaat Teknolojisi Bölümü
dc.departmentAÇÜ, Borçka Acarlar Meslek Yüksekokulu, Yapı Denetimi Bölümü
dc.description.abstractIt is a well-known fact that the use of agricultural wastes in cementitious composites by turning them into ash provides both ecological and economic benefits. Tea factories in Türkiye are located in the Eastern Black Sea region. Tea waste generated in factories locally causes environmental problems. This study focuses on the usability of the wastes left over from the products processed in the tea factory. Tea waste from Artvin, Türkiye was turned into ash at 850 °C. Physical, chemical, mineralogical, thermogravimetric and morphological properties of tea waste ash were examined. Pozzolanic activity test was performed to determine its usability in cement systems. Blended cement pastes were prepared by substituting up to 10% tea waste ash. Physical and chemical properties of blended cement pastes were determined. As a result, the tea waste ash was found to contain a high proportion of K2O. The waste material does not show pozzolanic properties. The hydration of cement pastes has accelerated with tea waste ash. Tea waste ash substitution has increased standard consistency water of blended cement pastes. Tea waste ash substitution up to 8% provided the initial setting time included in the standard. It was concluded that tea waste ash could be used as a setting accelerator.
dc.identifier.doi10.20528/cjcrl.2025.02.001
dc.identifier.endpage59
dc.identifier.issn25480928
dc.identifier.issue2
dc.identifier.scopus2-s2.0-105010040250
dc.identifier.scopusqualityQ4
dc.identifier.startpage51
dc.identifier.urihttps://hdl.handle.net/11494/5919
dc.identifier.volume16
dc.indekslendigikaynakScopus
dc.indekslendigikaynakTR-Dizin
dc.institutionauthorBekem Kara, İlknur
dc.institutionauthorKara, Cuma
dc.language.isoen
dc.publisherTulpar Academic Publishing
dc.relation.ispartofChallenge Journal of Concrete Research Letters
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.subjectAgricultural waste utilization
dc.subjectCement paste properties
dc.subjectCharacterization techniques
dc.subjectPozzolanic activity
dc.subjectTea waste ash
dc.titleTea waste ash: Characterization, pozzolanic activity and effects on the fresh properties of cement pastes
dc.typeArticle

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