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dc.contributor.authorYan, Yiru
dc.contributor.authorYang, Shen-Yu
dc.contributor.authorMiron, G. Dan
dc.contributor.authorColings, Ines E.
dc.contributor.authorL'Hôpital, Emilie
dc.contributor.authorSkibsted, Jorgen
dc.contributor.authorWinnefeld, Frank
dc.contributor.authorScrivener, Karen
dc.contributor.authorLothenbach, Barbara
dc.date.accessioned2023-03-27T07:33:44Z
dc.date.available2023-03-27T07:33:44Z
dc.date.created2023-03-24T08:30:14Z
dc.date.issued2022
dc.identifier.issn0008-8846
dc.identifier.urihttps://hdl.handle.net/11250/3060472
dc.description.abstractThis paper investigates the effect of KOH and NaOH on C-S-H structure and solubility. Both KOH and NaOH have a similar effect, they increase pH values and silicon concentrations, and decrease calcium concentrations. At higher alkali hydroxide concentrations, more portlandite precipitates, while amorphous silica dissolves. This increases the Ca/SiC-S-H at low Ca/Sitarget but lowers the maximum Ca/SiC-S-H from 1.5 to 1.2 in 1 M KOH/NaOH. The amount of alkalis bound in C-S-H increases with increasing alkali hydroxide concentrations and is higher at low Ca/SiC-S-H. KOH/NaOH lead to a structural rearrangement in C-S-H, increasing the interlayer distance, number of layers stacked in c direction and shortening the silica chains. The mean chain lengths (MCL) estimated from FTIR and Raman spectroscopy agree well with the trends from 29Si NMR. Comparison with the independently developed CASH+ thermodynamic model showed a good agreement between the observed and modelled changes, including the shortening of the MCL.en_US
dc.language.isoengen_US
dc.publisherElsevier B. V.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleEffect of alkali hydroxide on calcium silicate hydrate (C-S-H)en_US
dc.title.alternativeEffect of alkali hydroxide on calcium silicate hydrate (C-S-H)en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.volume151en_US
dc.source.journalCement and Concrete Researchen_US
dc.identifier.doi10.1016/j.cemconres.2021.106636
dc.identifier.cristin2016151
dc.source.articlenumber106636en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal