Performance of self-healing geopolymer paste produced using Bacillus subtilis

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dc.contributor.authorEkinci, Enes
dc.contributor.authorTurkmen, Ibrahim
dc.contributor.authorBirhanli, Emre
dc.date.accessioned2024-08-04T20:51:41Z
dc.date.available2024-08-04T20:51:41Z
dc.date.issued2022
dc.departmentİnönü Üniversitesien_US
dc.description.abstractThis study examines the effects of the usage of bacteria as a self-healing agent on the geopolymer paste (GP) sample's characteristics. Examining the microbial self-healing capacity of geopolymer binders, which have many advantages over traditional Portland cement, is seen as an important and necessary step because of frequently studying innovative approaches on geopolymer samples. To carry out this investigation, GP samples produced using ground blast furnace slag (GBFS) were activated only with Na2SiO3. Bacillus subtilis was selected as the healing agent for the production of GP samples. As a result of the preliminary tests in which different variables (curing environment, sample content) were examined, it was decided what the sample content to be used in the main test processes. The bacterial suspensions were prepared at ratios of 107 and 109 CFU/mL. Bacterial samples prepared at two different cell densities were added to the mixture at 1, 2 and 3% by weight of the binder. The GP samples that cured under laboratory conditions until the end of the 7th day, were subjected to healing process in three different curing environments (water, air and precipitation medium consisting of urea, yeast extract and Ca (NO3)2.4H2O After the healing process was completed, the compressive strength, rheological behaviour, geopolymerization kinetics, physical properties, microstructural and visual examinations were performed. Experimental findings demonstrated that the self-healing mechanism resulting from the metabolic activity of Bacillus subtilis can be successfully applied in geopolymer composites in terms of high durability and mechanical properties.en_US
dc.description.sponsorshipInonu University [FDK-2020-2156]en_US
dc.description.sponsorshipAcknowledgment The authors are grateful to the Inonu University for their financial support for the project FDK-2020-2156.en_US
dc.identifier.doi10.1016/j.conbuildmat.2022.126837
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.scopus2-s2.0-85124616246en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.conbuildmat.2022.126837
dc.identifier.urihttps://hdl.handle.net/11616/100485
dc.identifier.volume325en_US
dc.identifier.wosWOS:000765170700002en_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.subjectGeopolymeren_US
dc.subjectSelf-healingen_US
dc.subjectBacteriaen_US
dc.subjectCompressive strengthen_US
dc.subjectRheologyen_US
dc.titlePerformance of self-healing geopolymer paste produced using Bacillus subtilisen_US
dc.typeArticleen_US

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