Impact of triethanolamine on the sulfate balance of Portland cements with mixed sulfate carriers

dc.contributor.authorHirsch, Tamino
dc.contributor.authorLu, Zichen
dc.contributor.authorStephan, Dietmar
dc.date.accessioned2023-09-07T14:21:46Z
dc.date.available2023-09-07T14:21:46Z
dc.date.issued2021-05-12
dc.description.abstractThe differences between the hydration of Portland cements with single and with mixed sulfate carriers in the presence of triethanolamine (TEA) were investigated, and possible mechanisms were proposed. Without TEA, cements with different types of sulfate carriers (gypsum, hemihydrate, anhydrite, and mixture of these) have a comparable hydration process at the same molar amount of calcium sulfate. At a TEA dosage of 0.5 wt.%, the sample with a mixture of three sulfate carriers shows substantially stronger retardation of the C<sub>3</sub>S (This publication uses the cement chemist notation: C<sub>3</sub>S = Ca<sub>3</sub>SiO<sub>5</sub>, C<sub>2</sub>S = Ca<sub>2</sub>SiO<sub>4</sub>, C<sub>3</sub>A = Ca<sub>3</sub>Al<sub>2</sub>O<sub>6</sub>, C<sub>4</sub>AF = Ca<sub>2</sub>(Al, Fe)<sub>2</sub>O<sub>5</sub>.) hydration than the cements with only one of these sulfate carriers, which is likely caused by the rapid formation of ettringite and the fast depletion of all sulfate carriers. These effects indicate that TEA influences the balance of sulfate carriers with aluminate‐containing clinker phases. On the one hand, TEA can disturb the original sulfate balance due to the accelerated dissolution of aluminate‐containing clinker phases, especially C<sub>4</sub>AF. On the other hand, these effects are closely related to the types and amounts of the sulfate carriers in the cement. A higher amount of sulfate carriers can minimize the TEA‐related retardation of the C<sub>3</sub>S hydration, and hemihydrate shows the strongest impact at the same calcium sulfate quantity.en
dc.description.sponsorshipBMBF, 03XP0122A, BauProAddi - Neues Baustoff- und Produktionsdesign für additive Fertigungsprozesse im Bauwesen
dc.description.sponsorshipDFG, 387092747, Superposing particle interactions and hydration effects on the rheology of cementitious systems in the presence of different ions in the aqueous phase – (SPHERE DOS)
dc.identifier.eissn1551-2916
dc.identifier.issn0002-7820
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/19977
dc.identifier.urihttps://doi.org/10.14279/depositonce-18775
dc.language.isoen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften
dc.subject.otheraluminatesen
dc.subject.othercalcium silicate hydrateen
dc.subject.otherhydrationen
dc.subject.otherPortland cementen
dc.subject.othertriethanolamineen
dc.subject.otherTEAen
dc.titleImpact of triethanolamine on the sulfate balance of Portland cements with mixed sulfate carriers
dc.typeArticle
dc.type.versionpublishedVersion
dcterms.bibliographicCitation.doi10.1111/jace.17913
dcterms.bibliographicCitation.issue9
dcterms.bibliographicCitation.journaltitleJournal of the American Ceramic Society
dcterms.bibliographicCitation.originalpublishernameWiley
dcterms.bibliographicCitation.originalpublisherplaceNew York, NY
dcterms.bibliographicCitation.pageend4842
dcterms.bibliographicCitation.pagestart4829
dcterms.bibliographicCitation.volume104
dcterms.rightsHolder.referenceCreative-Commons-Lizenz
tub.accessrights.dnbfree
tub.affiliationFak. 6 Planen Bauen Umwelt::Inst. Bauingenieurwesen::FG Baustoffe und Bauchemie
tub.publisher.universityorinstitutionTechnische Universität Berlin

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