Enhancing the high-temperature resistance of self-healing bio-cementitious composites using tea waste as a bacterial carrier

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dc.authorid0000-0002-5338-4007
dc.contributor.authorYildirim, Musa
dc.contributor.authorOzhan, Hacer Bilir
dc.contributor.authorOz, Hilal Girgin
dc.contributor.authorOgut, Hamdi
dc.date.accessioned2026-02-08T15:15:22Z
dc.date.available2026-02-08T15:15:22Z
dc.date.issued2025
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractBacterial composites exhibit advanced self-healing capabilities; however, their effectiveness is often constrained by production processes and environmental conditions. To enhance bacterial viability, protective carriers are required, with natural fibers recently utilized for this purpose. Fiber reinforcement has been shown to improve self-healing efficiency by limiting crack propagation. This study investigates the potential of tea waste as a bacterial carrier in cementitious composites. Bacillus megaterium spores were absorbed into tea waste and incorporated into mortar specimens at varying concentrations. The durability of bacterial composites under hightemperature exposure, a critical yet underexplored aspect, was also evaluated. Mortar specimens containing bacterial tea waste were subjected to different high-temperature conditions in both undamaged and pre-cracked states, followed by compressive strength assessments. Post-exposure microstructural changes were analysed via scanning electron microscopy (SEM). The findings demonstrated that tea waste effectively functioned as a bacterial carrier, exhibiting behaviour comparable to natural fibers. Additionally, it contributed to enhanced residual strength by mitigating thermal stress and promoting calcite precipitation, facilitating damage repair. These results highlight the potential of tea waste as a sustainable and effective medium for improving the durability of bacterial composites against high-temperature effects.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [124M882]
dc.description.sponsorshipThis study was supported by Scientific and Technological Research Council of Turkey (TUBITAK) (Grant number: 124M882).
dc.identifier.doi10.1016/j.matlet.2025.138908
dc.identifier.issn0167-577X
dc.identifier.issn1873-4979
dc.identifier.scopus2-s2.0-105007648851
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1016/j.matlet.2025.138908
dc.identifier.urihttps://hdl.handle.net/20.500.12885/5748
dc.identifier.volume398
dc.identifier.wosWOS:001510912200002
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofMaterials Letters
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzWOS_KA_20260207
dc.subjectTea waste
dc.subjectBacterial mortar
dc.subjectSelf-healing
dc.subjectDurability
dc.titleEnhancing the high-temperature resistance of self-healing bio-cementitious composites using tea waste as a bacterial carrier
dc.typeArticle

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