Fracture parameters of alkali-activated aluminosilicate composites with ceramic precursor: durability aspects

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dc.contributor.authorŠimonová, Hanacs
dc.contributor.authorLipowczan, Martincs
dc.contributor.authorRozsypalová, Ivacs
dc.contributor.authorDaněk, Petrcs
dc.contributor.authorLehký, Davidcs
dc.contributor.authorRovnaníková, Pavlacs
dc.contributor.authorKeršner, Zbyněkcs
dc.coverage.volume33cs
dc.date.accessioned2021-12-07T15:54:07Z
dc.date.available2021-12-07T15:54:07Z
dc.date.issued2021-11-20cs
dc.description.abstractFour sets of alkali-activated aluminosilicate (AAAS) composites based on ceramic precursors were studied in terms of their characterization by mechanical fracture parameters as a basis for considerations of durability. AAAS composites made of brick powder as a precursor and alkaline activator with various silicate moduli (Ms = 0.8, 1.0, 1.2, 1.4, and 1.6) were investigated. The sets of AAAS composites differed in terms of the used filler: quartz sand or brick rubble. Two different precursor particle size ranges of 0–1 mm and 0–0.3 mm were used for both types of filler. The test specimens had nominal dimensions of 40 × 40 × 160 mm and were provided with a notch at midspan after 28 days of hardening. The notches were cut up to 1/3 of the height of the specimens. The specimens were subjected to three-point bending fracture tests during which force vs. deflection (F–d) and force vs. crack mouth opening displacement (F–CMOD) diagrams were recorded. Tensile strength ft,ID and specific fracture energy GF,ID values were identified using the inverse method based on a neural network ensemble. The obtained F–CMOD diagrams were subsequently evaluated using the double-K fracture model supported by the ft,ID and GF,ID values. The double-K model allows the quantification of two different levels of crack propagation: initiation, which corresponds to the beginning of stable crack growth, and unstable crack propagation.en
dc.formattextcs
dc.format.extent207-214cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationProcedia Structural Integrity. 2021, vol. 33, p. 207-214.en
dc.identifier.doi10.1016/j.prostr.2021.10.025cs
dc.identifier.issn2452-3216cs
dc.identifier.other173315cs
dc.identifier.urihttp://hdl.handle.net/11012/203090
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofProcedia Structural Integritycs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S2452321621001207cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2452-3216/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectAlkali-activated aluminosilicateen
dc.subjectartificial neural networken
dc.subjectneural network ensembleen
dc.subjectcrack initiationen
dc.subjectdouble-K modelen
dc.subjectfracture testen
dc.subjectforce–displacement diagramen
dc.subjectmechanical fracture parameters.en
dc.titleFracture parameters of alkali-activated aluminosilicate composites with ceramic precursor: durability aspectsen
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-173315en
sync.item.dbtypeVAVen
sync.item.insts2021.12.13 16:54:46en
sync.item.modts2021.12.13 16:14:21en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav stavební mechanikycs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav stavebního zkušebnictvícs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav chemiecs
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