Bacteria-based self-healing of cement mortars loaded at different levels and exposed to high temperature

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dc.authorid0000-0001-7085-4819
dc.authorid0000-0003-0728-0431
dc.authorid0000-0002-5338-4007
dc.contributor.authorYildirim, Musa
dc.contributor.authorOzhan, Hacer Bilir
dc.contributor.authorOz, Hilal Girgin
dc.date.accessioned2026-02-12T21:05:17Z
dc.date.available2026-02-12T21:05:17Z
dc.date.issued2022
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractStructures are exposed to various external effects and loads throughout their service life, which can result in failure at a load lower than the design compressive strength. There are cement-based healing systems for repairing such damage, but it is often insufficient. A more effective autonomous healing system is thus needed, and microbial-induced calcite precipitation (MICP) has been studied for this purpose. In this study, bacterial mortar (BM) samples were produced and loaded at different levels of their ultimate compressive stress. The effects of loading were determined and the effectiveness of bacterial treatments was investigated. Experiments were conducted to determine crack healing, compressive strength, water absorption, ultrasonic pulse velocity and high-temperature effects. In the BM samples, the MICP mechanism repaired cracks about 3.5 times larger than the control samples. While the treatment of cracks and damage observed at 90% and 100% loading levels were highly limited thanks to the autogenous system, some properties of the BMs improved as the loading level increased. The MICP mechanism was especially effective in damaged samples under high load levels. In addition, the BMs demonstrated superior physical, mechanical and durability properties at each loading level.
dc.description.sponsorshipYOK100/2000 PhD programme
dc.description.sponsorshipMusa Yildirim was supported by the YOK100/2000 PhD programme throughout this study.
dc.identifier.doi10.1680/jmacr.22.00238
dc.identifier.endpage684
dc.identifier.issn0024-9831
dc.identifier.issn1751-763X
dc.identifier.issue13
dc.identifier.scopus2-s2.0-85144519830
dc.identifier.scopusqualityQ2
dc.identifier.startpage674
dc.identifier.urihttps://doi.org/10.1680/jmacr.22.00238
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6876
dc.identifier.volume75
dc.identifier.wosWOS:000919762900001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherEmerald Group Publishing Ltd
dc.relation.ispartofMagazine of Concrete Research
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260212
dc.subjectbacterial mortar
dc.subjectcracks
dc.subjectdurability
dc.subjectself-healing
dc.subjecttemperature effects
dc.titleBacteria-based self-healing of cement mortars loaded at different levels and exposed to high temperature
dc.typeArticle

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