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Usability of sustainable materials on bacteria-based self-healing in cementitious systems

dc.contributor.authorYazıcı, Ş.
dc.contributor.authorGüller, C.
dc.contributor.authorAyekin, B.
dc.contributor.authorMardani, A.
dc.contributor.authorAkkaya, A.
dc.contributor.buuauthorMARDANİ, ALİ
dc.contributor.buuauthorAyekin, Burcu
dc.contributor.departmentMühendislik Fakültesi
dc.contributor.departmentİnşaat Mühendisliği Ana Bilim Dalı
dc.contributor.orcid0000-0003-0326-501
dc.contributor.scopusid58898851200
dc.contributor.scopusid57427018800
dc.date.accessioned2025-05-13T06:10:21Z
dc.date.issued2023-10-01
dc.description.abstractDamage and loss of strength resulting from deterioration in concrete structures are extremely expensive and time-consuming processes that require improvement. Therefore, special concrete demand to respond to crack formation with its self-healing action leads to microbial concrete research and development. In this study, the effects of bacterial utilization on both mechanical/physical properties of the recycled concrete aggregates (RCA) containing mortar mixtures and the crack-healing were investigated. Bacillus subtilis bacteria were cultivated on three different nutrient media, Tryptic Soy Broth, Modify Luria-Bertani, and urea-calcium phosphate, and then encapsulated in RCA with these nutrient media. Twenty-one different mortar mixtures were prepared by partially replacement of bacterial RCA with the limestone one. The compressive and flexural strengths as well as ultrasonic pulse velocity of mortar mixtures were determined. Also, physical properties of the mortar mixtures such water absorption, capillarity and total void ratio were obtained. It was observed that the physical and mechanical properties of the mortar mixtures containing less than 30% RCA are significantly healed by CaCO3 precipitated by bacteria. The results showed that that urea and Ca2+ in the nutrient media increase the CaCO3 precipitation efficiency of bacteria, but glucose in the media causes foaming in the mixtures and creates a hollow structure. The study also indicated that microorganisms had a positive role not only in the concrete strength increasing but also in facilitating the self-healing of cracks. It was observed that the cracks formed up to 0.3 mm in the bacterial mortar mixtures were mostly closed in 7 days.
dc.identifier.doi10.1177/1045389X231157358
dc.identifier.endpage 2019
dc.identifier.issn1045-389X
dc.identifier.issue17
dc.identifier.scopus2-s2.0-85150881355
dc.identifier.startpage1998
dc.identifier.urihttps://hdl.handle.net/11452/51460
dc.identifier.volume34
dc.indexed.scopusScopus
dc.language.isoen
dc.publisherSAGE Publications Ltd
dc.relation.journalJournal of Intelligent Material Systems and Structures
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSustainability
dc.subjectSelf-healing
dc.subjectRecycled concrete aggregate
dc.subjectNutrient media
dc.subjectCalcium carbonate precipitation
dc.subject.scopusSelf-Healing Concrete and Bacterial Mineralization Innovations
dc.titleUsability of sustainable materials on bacteria-based self-healing in cementitious systems
dc.typeArticle
dspace.entity.typePublication
local.contributor.departmentMühendislik Fakültesi/ İnşaat Mühendisliği Ana Bilim Dalı
relation.isAuthorOfPublicationdd2de18c-4ec0-4272-8671-0094502e4353
relation.isAuthorOfPublication.latestForDiscoverydd2de18c-4ec0-4272-8671-0094502e4353

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