Adsorption of PCE in alkali-activated materials analysed by fluorescence microscopy

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dc.date.accessioned2022-07-11T10:53:58Z
dc.date.available2022-07-11T10:53:58Z
dc.date.issued2021-10-18
dc.description.sponsorshipGefördert im Rahmen des Projekts DEALger
dc.identifierdoi:10.17170/kobra-202204276101
dc.identifier.urihttp://hdl.handle.net/123456789/13986
dc.language.isoengeng
dc.relation.doidoi:10.1111/jmi.13066
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectfluorochromeeng
dc.subjectfly asheng
dc.subjectground granulated blast furnace slageng
dc.subjectpolycarboxylate ethereng
dc.subjectstainingeng
dc.subject.ddc660
dc.subject.swdFluorochromeger
dc.subject.swdFlugascheger
dc.subject.swdHüttensandger
dc.subject.swdBetonherstellungger
dc.subject.swdHochfester Betonger
dc.subject.swdFluoreszenzmikroskopieger
dc.titleAdsorption of PCE in alkali-activated materials analysed by fluorescence microscopyeng
dc.typeAufsatz
dc.type.versionpublishedVersion
dcterms.abstractThe realisation of high-performance concrete mixtures requires the use of superplasticizers to achieve a low water/binder ratio and thus high strengths. Polycarboxylate ethers (PCE) are mostly used as superplasticizers. The effectiveness of these superplasticizers depends on their chemical structure, the binders’ alkaline environment and the ions present in the pore solution of the binder. In high alkaline systems like some alkali-activated materials no effective superplasticizer have been found yet. To unravel the compatibility of certain PCE to such a highly alkaline system a fluorescence microscopy approach was used. In first experiments, the adsorption of APEG (allyl ether) and MPEG (methacrylate) PCE on ground granulated blast furnace slag and fly ash was investigated varying the concentration of the activators. At a certain concentration, a complexation of the PCE can be recognised in fluorescence microscope. APEG shows a better stability compared to MPEG; this correlates with rheological investigations.eng
dcterms.accessRightsopen access
dcterms.creatorWetzel, Alexander
dcterms.creatorLink, Janna
dcterms.creatorMiddendorf, Bernhard
dcterms.source.identifiereissn:1365-2818
dcterms.source.issueIssue 2
dcterms.source.journalJournal of Microscopyeng
dcterms.source.pageinfo79-84
dcterms.source.volumeVolume 286
kup.iskupfalse

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