CHARACTERISATION OF THERMAL-LOADED CEMENT-BASED COMPOSITES BY COMBINED TIME-LAPSE TOMOGRAPHY AND THE FOUR-POINT BENDING TEST

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dc.contributor.authorKumpová, Ivanacs
dc.contributor.authorFíla, Tomášcs
dc.contributor.authorKoudelka, Petrcs
dc.contributor.authorČairović, Ivacs
dc.contributor.authorKeršner, Zbyněkcs
dc.contributor.authorKytýř, Danielcs
dc.contributor.authorVopálenský, Michalcs
dc.contributor.authorVavřík, Danielcs
dc.coverage.issue1cs
dc.coverage.volume28cs
dc.date.issued2020-04-01cs
dc.description.abstractQuasi-brittle materials like cement-based composites, rocks, and bricks are subjected to a number of environmental loadings throughout the life cycle of buildings. For instance, fluctuation of the ambient temperature (climatic cycles or fire) causing a variety of physical and chemical transitions resulting in structural changes and affecting the mechanical properties. In this work a special mixture containing glass spheres and Portland cement was evaluated by a combination of four-point bending and time-lapse X-ray computed tomography to verify the feasibility of this novel combined method. The effect of temperature on the behavior of investigated material in terms of sphericity of the present glass spheres and the way of crack propagation under load together with its influence to mechanical fracture parameters was studied. The described methodology was used especially to be able to monitor these changes throughout the loading process, as the characterization of the fracture surface using conventional optical methods is possible only after the complete fracture of the specimen and total damage of used material results in loosening of the matrix and filler to such an extent, that the results of these methods may be very distorted. It has been proven that the developed method can be used to characterize the internal structural changes in building materials and thus contribute to the understanding of the fracture processes during mechanical loading. Up to 600 degrees C the glass spheres stay spherical and the crack is propagating through the interfacial transition zone, while at higher temperatures the glass loses its shape and the newly formed pores cause also cracks within the inclusions. The relationship between compressive strength and the maximum loading temperature was confirmed.en
dc.formattextcs
dc.format.extent124-134cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationThe Civil Engineering Journal. 2020, vol. 28, issue 1, p. 124-134.en
dc.identifier.doi10.14311/CEJ.2020.01.0011cs
dc.identifier.issn1805-2576cs
dc.identifier.orcid0000-0001-8556-4996cs
dc.identifier.orcid0000-0003-3109-3820cs
dc.identifier.orcid0000-0003-4724-6166cs
dc.identifier.other166317cs
dc.identifier.researcheridH-2130-2014cs
dc.identifier.researcheridAAW-8717-2020cs
dc.identifier.researcheridAAW-7298-2020cs
dc.identifier.scopus56242448600cs
dc.identifier.scopus56939004900cs
dc.identifier.scopus6504210776cs
dc.identifier.urihttp://hdl.handle.net/11012/196721
dc.language.isoencs
dc.publisherCTU in Prague, Faculty of Civil Engineeringcs
dc.relation.ispartofThe Civil Engineering Journalcs
dc.relation.urihttp://civilengineeringjournal.cz/archive/issues/2020/2020_1/1-2020-0011-(124-134).pdfcs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1805-2576/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectFine-grained cement-based compositesen
dc.subjectQuasi-brittle materialen
dc.subjectX-Ray computed tomographyen
dc.subjectInstrumented four-point bending testen
dc.subjectCrack pathen
dc.titleCHARACTERISATION OF THERMAL-LOADED CEMENT-BASED COMPOSITES BY COMBINED TIME-LAPSE TOMOGRAPHY AND THE FOUR-POINT BENDING TESTen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-166317en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:45:25en
sync.item.modts2025.01.17 16:43:01en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav stavební mechanikycs
thesis.grantorVysoké učení technické v Brně. . Ústav teoretické a aplikované mechaniky AV ČRcs
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