Possibilities of K-Value Determination for Active Admixtures with Respect to Durability

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dc.contributor.authorŠperling, Petrcs
dc.contributor.authorHubáček, Adamcs
dc.contributor.authorHela, Rudolfcs
dc.contributor.authorStará, Terezacs
dc.contributor.authorDvořák, Richardcs
dc.coverage.issue10cs
dc.coverage.volume18cs
dc.date.accessioned2025-07-17T12:58:55Z
dc.date.available2025-07-17T12:58:55Z
dc.date.issued2025-05-12cs
dc.description.abstractThis paper discusses the possibility of determining k-values for active admixtures concerning durability factors such as the depth of penetration of water under pressure and the depth of carbonation of cement mortars with fly ash. The k-value considers the use of active admixtures in concrete when calculating the water/cement ratio and the equivalent amount of binder. Currently, only the effect of the active admixture on the compressive strength of concrete and cement mortars is considered when determining the k-value, but not the effect of the active admixture on durability. To account for the influence of durability factors on the determination of the k-value, the mathematical functions of the property, dependent on the water/cement ratio and the age of the cement mortar, were constructed using regression analysis. From the determined functions, it was then possible to use an optimisation problem to determine the k-value so the difference between the actual measurement and calculated depth of pressure water seepage or carbonation was as small as possible. A high coefficient of determination of 0.9855 was achieved for the pressure water seepage depth function, but the coefficient of determination for the carbonation depth was lower.en
dc.formattextcs
dc.format.extent1-25cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMaterials . 2025, vol. 18, issue 10, p. 1-25.en
dc.identifier.doi10.3390/ma18102227cs
dc.identifier.issn1996-1944cs
dc.identifier.orcid0000-0001-7524-5449cs
dc.identifier.orcid0000-0001-6200-1728cs
dc.identifier.orcid0000-0003-0024-2344cs
dc.identifier.other198088cs
dc.identifier.researcheridAAL-7858-2020cs
dc.identifier.scopus57195216023cs
dc.identifier.urihttps://hdl.handle.net/11012/255197
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMaterialscs
dc.relation.urihttps://www.mdpi.com/1996-1944/18/10/2227cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1996-1944/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectk-valueen
dc.subjectactivity indexen
dc.subjectsupplementary cementitious materialsen
dc.subjectfly ashen
dc.subjectdurabilityen
dc.titlePossibilities of K-Value Determination for Active Admixtures with Respect to Durabilityen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-198088en
sync.item.dbtypeVAVen
sync.item.insts2025.07.17 14:58:55en
sync.item.modts2025.07.17 14:33:09en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav technologie stavebních hmot a dílcůcs
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