Relating Ettringite formation and rheological changes during the Initial cement hydration

dc.contributor.authorJakob, Cordula
dc.contributor.authorJansen, Daniel
dc.contributor.authorUkrainczyk, Neven
dc.contributor.authorKoenders, Eddie
dc.contributor.authorPott, Ursula
dc.contributor.authorStephan, Dietmar
dc.contributor.authorNeubauer, Jürgen
dc.date.accessioned2019-11-19T15:08:06Z
dc.date.available2019-11-19T15:08:06Z
dc.date.issued2019-09-12
dc.date.updated2019-10-08T09:05:22Z
dc.description.abstractIn order to gain a deeper understanding of the rheological development of hydrating ordinary Portland cement (OPC) pastes at initial state, and to better understand their underlying processes, quantitative X-ray diffraction (XRD) analysis and rheological measurements were conducted and their results combined. The time-dependent relation between phase development and flow behavior of cement paste was investigated at two different temperatures (20 and 30 °C), over a period of two hours. Regarding the phase development during hydration, ettringite precipitation was identified as the dominant reaction in the first two hours. For both temperatures, the increasing ettringite content turned out to correlate very well with the loss of workability of the reacting cement paste. An exponential relationship between ettringite growth and flow behavior was observed that could be explained by applying the Krieger-Dougherty equation, which describes the influence of solid fraction on the viscosity of a suspension.en
dc.description.sponsorshipDFG, 386869775, Rheologie wirksame Additive in Portlandzement-basierten Formulierungen - Von nano/mikro-skaligen Strukturen zu makroskopischen Eigenschaftenen
dc.description.sponsorshipDFG, 387065993, Formfüllungsvermögen von Frischbetonen - ein zeit- und hydratationsabhängiger Ansatzen
dc.identifier.eissn1996-1944
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/10342
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-9304
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc600 Technik, Technologiede
dc.subject.otherhydration kineticsen
dc.subject.otherrheologyen
dc.subject.otherettringite formationen
dc.subject.otherOPCen
dc.subject.othertemperatureen
dc.subject.othermodelingen
dc.subject.otherscanning electron microscopyen
dc.subject.otherSEMen
dc.titleRelating Ettringite formation and rheological changes during the Initial cement hydrationen
dc.title.subtitlea comparative study applying XRD analysis, rheological measurements and modelingen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber2957en
dcterms.bibliographicCitation.doi10.3390/ma12182957en
dcterms.bibliographicCitation.issue18en
dcterms.bibliographicCitation.journaltitleMaterialsen
dcterms.bibliographicCitation.originalpublishernameMDPIen
dcterms.bibliographicCitation.originalpublisherplaceBaselen
dcterms.bibliographicCitation.volume12en
tub.accessrights.dnbfreeen
tub.affiliationFak. 6 Planen Bauen Umwelt::Inst. Bauingenieurwesen::FG Baustoffe und Bauchemiede
tub.affiliation.facultyFak. 6 Planen Bauen Umweltde
tub.affiliation.groupFG Baustoffe und Bauchemiede
tub.affiliation.instituteInst. Bauingenieurwesende
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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