Comparison of thermogravimetry response of alkali-activated slag and Portland cement pastes after stopping their hydration using solvent exchange method

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dc.contributor.authorBílek, Vlastimilcs
dc.contributor.authorŠvec, Jiřícs
dc.contributor.authorMásilko, Jiřícs
dc.contributor.authorSedlačík, Martincs
dc.contributor.authorMaterak, Kalinacs
dc.contributor.authorWieczorek, Alicjacs
dc.contributor.authorKoniorczyk, Marcincs
dc.contributor.authorHajzler, Jancs
dc.contributor.authorKucharczyková, Barbaracs
dc.coverage.issue2424cs
dc.date.accessioned2025-03-26T11:43:13Z
dc.date.available2025-03-26T11:43:13Z
dc.date.issued2024-08-18cs
dc.description.abstractThe critical step for any subsequent instrumental analysis of cementitious binders is to stop their hydration reactions, i.e., to remove free water. One of the most available techniques is a solvent exchange method. However, the solvents are known to be strongly bound in ordinary Portland cement (OPC) paste and alter the results of thermogravimetric analysis (TGA) and sensitive hydrates, while their effect on TGA response of alkali-activated slag (AAS) has not been comprehensively investigated. Therefore, the objective of this paper is to track the effects of fundamental aspects of the solvent exchange on the TGA response of AAS with different sodium activators (hydroxide, carbonate, waterglass) and to support these results by X-ray diffraction and effluent gas analysis. All solvents used (acetone, diethyl ether, isopropyl alcohol, ethanol, and methanol) affected the TGA response of all tested pastes, and their effect was enhanced by prolonged immersion time. All solvents induced an additional mass loss at around 800 degrees C and, especially for OPC paste, increased in situ carbonation, even in an inert atmosphere. Methanol and ethanol had a detrimental effect on ettringite and decreased the basal distance of the C-(A)-S-H gel, while they only marginally affected gaylussite. For AAS, hydration stoppage by washing out the alkali-rich pore solution with water was also investigated and can usually be recommended (except for its detrimental effect on gaylussite), as it is more efficient than organic solvents, which lack solubility for activators. Methanol and ethanol are the most suitable alternatives, particularly for NaOH.en
dc.formattextcs
dc.format.extent1-25cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJournal of Thermal Analysis and Calorimetry. 2024, issue 2424, p. 1-25.en
dc.identifier.doi10.1007/s10973-024-13552-3cs
dc.identifier.issn1588-2926cs
dc.identifier.orcid0000-0003-3831-3443cs
dc.identifier.orcid0000-0002-2943-9864cs
dc.identifier.orcid0000-0001-9587-5843cs
dc.identifier.orcid0000-0002-4641-2081cs
dc.identifier.orcid0000-0002-4875-4309cs
dc.identifier.orcid0000-0002-7123-5099cs
dc.identifier.other189813cs
dc.identifier.researcheridAAB-9386-2022cs
dc.identifier.researcheridQ-1628-2018cs
dc.identifier.researcheridAAM-3121-2020cs
dc.identifier.scopus56338516900cs
dc.identifier.scopus25621858200cs
dc.identifier.scopus57202956588cs
dc.identifier.scopus36171769500cs
dc.identifier.urihttps://hdl.handle.net/11012/250192
dc.language.isoencs
dc.publisherSpringer Naturecs
dc.relation.ispartofJournal of Thermal Analysis and Calorimetrycs
dc.relation.urihttps://link.springer.com/article/10.1007/s10973-024-13552-3cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1588-2926/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectAlkali-activated slagen
dc.subjectCementen
dc.subjectSolvent exchangeen
dc.subjectOrganic solventsen
dc.subjectThermogravimetryen
dc.subjectCarbonationen
dc.titleComparison of thermogravimetry response of alkali-activated slag and Portland cement pastes after stopping their hydration using solvent exchange methoden
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-189813en
sync.item.dbtypeVAVen
sync.item.insts2025.03.26 12:43:13en
sync.item.modts2025.03.26 11:33:30en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav chemie materiálůcs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav stavebního zkušebnictvícs
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