Correlating Hydration of Alkali-Activated Slag Modified by Organic Additives to the Evolution of Its Properties

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dc.contributor.authorBílek, Vlastimilcs
dc.contributor.authorKalina, Lukášcs
dc.contributor.authorDvořák, Richardcs
dc.contributor.authorNovotný, Radoslavcs
dc.contributor.authorŠvec, Jiřícs
dc.contributor.authorMásilko, Jiřícs
dc.contributor.authorŠoukal, Františekcs
dc.coverage.issue5cs
dc.coverage.volume16cs
dc.date.issued2023-02-25cs
dc.description.abstractThis study investigates the relationships between the hydration kinetics of waterglass-activated slag and the development of its physical-mechanical properties, as well as its color change. To modify the calorimetric response of alkali-activated slag, hexylene glycol was selected from various alcohols for in-depth experiments. In presence of hexylene glycol, the formation of initial reaction products was restricted to the slag surface, which drastically slowed down the further consumption of dissolved species and slag dissolution and consequently delayed the bulk hydration of the waterglass-activated slag by several days. This allowed to show that the corresponding calorimetric peak is directly related to the rapid evolution of the microstructure and physical-mechanical parameters and to the onset of a blue/green color change recorded as a time-lapse video. Workability loss was correlated with the first half of the second calorimetric peak, while the most rapid increase in strengths and autogenous shrinkage was related to the third calorimetric peak. Ultrasonic pulse velocity increased considerably during both the second and third calorimetric peak. Despite the modified morphology of the initial reaction products, the prolonged induction period, and the slightly reduced degree of hydration induced by hexylene glycol, the overall mechanism of alkaline activation remained unchanged in the long-term perspective. It was hypothesized that the main issue of the use of organic admixtures in alkali-activated systems is the destabilizing effect of these admixtures on soluble silicates introduced into the system with an activator.en
dc.formattextcs
dc.format.extent1-18cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMaterials . 2023, vol. 16, issue 5, p. 1-18.en
dc.identifier.doi10.3390/ma16051908cs
dc.identifier.issn1996-1944cs
dc.identifier.orcid0000-0003-3831-3443cs
dc.identifier.orcid0000-0001-8127-8175cs
dc.identifier.orcid0000-0003-0024-2344cs
dc.identifier.orcid0000-0002-1809-5875cs
dc.identifier.orcid0000-0002-2943-9864cs
dc.identifier.orcid0000-0001-9587-5843cs
dc.identifier.orcid0000-0002-0234-3467cs
dc.identifier.other183050cs
dc.identifier.researcheridAAB-9386-2022cs
dc.identifier.researcheridAAL-7858-2020cs
dc.identifier.researcheridAAY-4689-2020cs
dc.identifier.researcheridQ-1628-2018cs
dc.identifier.researcheridQ-2440-2015cs
dc.identifier.scopus55255338000cs
dc.identifier.scopus57195216023cs
dc.identifier.scopus57188564285cs
dc.identifier.scopus56338516900cs
dc.identifier.scopus25621858200cs
dc.identifier.urihttp://hdl.handle.net/11012/209176
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMaterialscs
dc.relation.urihttps://www.mdpi.com/1996-1944/16/5/1908cs
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.subjectalkali-activated slagen
dc.subjectcalorimetryen
dc.subjectmicrostructureen
dc.subjectretardationen
dc.subjectpore solutionen
dc.subjectorganic admixtureen
dc.subjectcolor changeen
dc.subjectshrinkageen
dc.subjectsettingen
dc.titleCorrelating Hydration of Alkali-Activated Slag Modified by Organic Additives to the Evolution of Its Propertiesen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-183050en
sync.item.dbtypeVAVen
sync.item.insts2024.03.01 18:46:00en
sync.item.modts2024.03.01 18:14:05en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav chemie materiálůcs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav fyzikycs
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