The Effect of Specimen Size on Acoustic Emission Parameters and Approximate Position of Defects Obtained during Destructive Testing of Cementitious and Alkali-Activated Degraded Fine-Grained Materials

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dc.contributor.authorTopolář, Liborcs
dc.contributor.authorKocáb, Daliborcs
dc.contributor.authorHrubý, Petrcs
dc.contributor.authorJakubka, Lubošcs
dc.contributor.authorHoduláková, Michaelacs
dc.contributor.authorHalamová, Romanacs
dc.coverage.issue9cs
dc.coverage.volume16cs
dc.date.issued2023-05-04cs
dc.description.abstractTwo sizes of test samples were selected to investigate the effect of size on the level of degradation. The smaller test specimens had dimensions of 40 × 40 × 160 mm, and the larger ones had dimensions of 100 × 100 × 400 mm. Both sizes of test specimens were always made of the same mortar. In one case, Blast Furnace Cement was chosen as the binder. In the other case, it was an alkali-activated material as a possibly more environmentally economical substitute. Both types of material were deposited in three degrading solutions: magnesium sulphate, ammonium nitrate and acetic acid. The reference set was stored in a water bath. After six months in the degradation solutions, a static elastic modulus was determined for the specimens during this test, and the acoustic emission was measured. Acoustic emission parameters were evaluated: the number of hits, the amplitude magnitude and a slope from the amplitude magnitude versus time (this slope should correspond to the Kaiser effect). For most of the parameters studied, the size effect was more evident for the more degraded specimens, i.e., those placed in aggressive solutions. The approximate location of emerging defects was also determined using linear localisation for smaller specimens where the degradation effect was more significant. In more aggressive environments (acetic acid, ammonium nitrate), the higher resistance of materials based on alkaline-activated slag was more evident, even in the case of larger test bodies. The experiments show that the acoustic emission results agree with the results of the static modulus of elasticity.en
dc.formattextcs
dc.format.extent1-17cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMaterials . 2023, vol. 16, issue 9, p. 1-17.en
dc.identifier.doi10.3390/ma16093527cs
dc.identifier.issn1996-1944cs
dc.identifier.orcid0000-0001-9437-473Xcs
dc.identifier.orcid0000-0002-8273-4571cs
dc.identifier.orcid0000-0002-0369-2984cs
dc.identifier.orcid0000-0001-9068-3471cs
dc.identifier.orcid0000-0001-9399-3694cs
dc.identifier.other183407cs
dc.identifier.researcheridE-9341-2018cs
dc.identifier.researcheridAAW-8720-2020cs
dc.identifier.scopus37051376500cs
dc.identifier.scopus56721310500cs
dc.identifier.urihttp://hdl.handle.net/11012/209425
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMaterialscs
dc.relation.urihttps://www.mdpi.com/1996-1944/16/9/3527cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1996-1944/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectsize effecten
dc.subjectdegradationen
dc.subjectacoustic emission methoden
dc.subjectstatic modulus of elasticityen
dc.subjectKaiser effecten
dc.subjectblast furnace slagen
dc.subjectblast furnace cementen
dc.subjectlinear localisationen
dc.titleThe Effect of Specimen Size on Acoustic Emission Parameters and Approximate Position of Defects Obtained during Destructive Testing of Cementitious and Alkali-Activated Degraded Fine-Grained Materialsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-183407en
sync.item.dbtypeVAVen
sync.item.insts2024.04.24 15:46:16en
sync.item.modts2024.04.24 15:13:52en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav fyzikycs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Fyzika AdMaScs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav stavebního zkušebnictvícs
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav chemie materiálůcs
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