Rodyti trumpą aprašą

dc.contributor.authorIvaškė, Augusta
dc.contributor.authorGuobužaitė, Simona
dc.contributor.authorJakubovskis, Ronaldas
dc.contributor.authorGribniak, Viktor
dc.contributor.authorUrbonavičius, Jaunius
dc.date.accessioned2023-09-18T20:35:56Z
dc.date.available2023-09-18T20:35:56Z
dc.date.issued2020
dc.identifier.urihttps://etalpykla.vilniustech.lt/handle/123456789/151211
dc.description.abstractBackground: Concrete is the most widely used building material in the world. However, cracks inevitably open up in concrete structures. Some bacteria can precipitate calcium carbonate crystals that fill the cracks. The bacteria incorporated in the concrete matrix must survive the harch alkaline conditions. Most studies investigate the suitability of calcium source and bacteria species for self-healing without testing the viability of bacteria in the concrete matrix. Objectives: For the formation of biological self-healing concrete specific alkaliphilic spore-forming bacteria and mineral precursor compounds such as calcium lactate are needed. In this study, the viability of three Bacillus species in a concrete matrix containing several types of cement with different pH and metal ion concentrations was investigated. Methods: The sporulation of Bacillus bacteria was investigated using the light microscopy. An expanded clay (EC) was used to impregnate the bacterial spores and calcium lactate under the vacuum; the concrete mix was obtained by mixing EC, cement, sand and water. Viability of endospores was measured using standard microbiological dilution-to-extinction method by CFU counting after plating on alkaline nutrient agar. Results: Out of four cement types commonly used in Lithuania, the best survival rate was obtained in a concrete mix using the white CEM I cement. After 3 days of incubation, only 3.3% of Bacillus pseudofirmus, 1.4% of Bacillus cohnii and 1.6% of Bacillus halodurans remained viable. These results demonstrate that additional coatings of EC aggregates are needed to improve the viability of bacteria in the concrete.lit
dc.format.mediumtekstas / txt
dc.language.isoeng
dc.rightsLaisvai prieinamas internete
dc.source.urihttps://talpykla.elaba.lt/elaba-fedora/objects/elaba:80681177/datastreams/MAIN/content
dc.titleInvestigating viability of alkaliphilic Bacillus species in biological self-healing concrete
dc.typeKonferencijos pranešimo santrauka / Conference presentation abstract
dcterms.references0
dc.type.pubtypeT2 - Konferencijos pranešimo tezės / Conference presentation abstract
dc.contributor.institutionVilniaus Gedimino technikos universitetas Vilniaus Gedimino technikos universitetas
dc.contributor.institutionVilniaus Gedimino technikos universitetas
dc.contributor.facultyFundamentinių mokslų fakultetas / Faculty of Fundamental Sciences
dc.contributor.facultyStatybos fakultetas / Faculty of Civil Engineering
dc.contributor.departmentStatinių ir tiltų konstrukcijų institutas / Institute of Building and Bridge Structures
dc.subject.researchfieldT 005 - Chemijos inžinerija / Chemical engineering
dc.subject.researchfieldT 008 - Medžiagų inžinerija / Material engineering
dc.subject.researchfieldN 004 - Biochemija / Biochemistry
dc.subject.vgtuprioritizedfieldsFM0202 - Ląstelių ir jų biologiškai aktyvių komponentų tyrimai / Investigations on cells and their biologically active components
dc.subject.ltspecializationsL104 - Nauji gamybos procesai, medžiagos ir technologijos / New production processes, materials and technologies
dc.subject.ltBacillus species
dc.subject.ltself-healing
dc.subject.ltconcrete
dc.subject.ltsurvival of spores
dcterms.sourcetitleFEMS Online Conference on Microbiology, 28–31 October 2020 : Electronic abstract book
dc.publisher.nameFederation of European Microbiological Societies (FEMS) with the Serbian Society of Microbiology (ASM)
dc.publisher.cityBelgrade
dc.identifier.elaba80681177


Šio įrašo failai

Thumbnail

Šis įrašas yra šioje (-se) kolekcijoje (-ose)

Rodyti trumpą aprašą