Negative effect of Zinc compounds on hydration kinetics of ordinary Portland cement

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dc.contributor.authorMatějka, Lukášcs
dc.contributor.authorŠiler, Pavelcs
dc.contributor.authorNovotný, Radoslavcs
dc.contributor.authorŠvec, Jiřícs
dc.contributor.authorMásilko, Jiřícs
dc.contributor.authorŠoukal, Františekcs
dc.coverage.issue1cs
dc.coverage.volume1039cs
dc.date.issued2021-01-18cs
dc.description.abstractHeavy metals have significant effect on cement hydration mechanism and kinetics. The recycling of waste materials leads to increase of content of heavy metals in various industrial products and visibly affects properties of the Portland cement. One of the heavy metals that has been known to drastically increase the setting time is Zinc. Zinc forms various hydroxyl species with calcium cations. Pore solution thus has lowered concentration of calcium which suppresses formation of portlandite. Due to insufficient concentration of calcium the formation of CSH gel and further hydration of clinker grains is inhibited The aim of this study is to quantify the negative effects of Zinc at different concentrations at ambient temperature of 20 °C. Isoperibolic calorimetry was used to measure the negative effects of zinc on hydration kinetics of ordinary Portland cement. Zinc was added to the cement in the form of two soluble salts of Zn(NO3)2 hydrate, ZnCl2 and a poorly soluble compound ZnO. The concentration of zinc added was chosen between 0.1 and 1 mass % of clinker. Significant retardation of cement hydration with increasing zinc content was proven.en
dc.formattextcs
dc.format.extent1-9cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationIOP Conference Series: Materials Science and Engineering. 2021, vol. 1039, issue 1, p. 1-9.en
dc.identifier.doi10.1088/1757-899X/1039/1/012004cs
dc.identifier.issn1757-8981cs
dc.identifier.orcid0000-0002-7659-4402cs
dc.identifier.orcid0000-0002-0383-1577cs
dc.identifier.orcid0000-0002-1809-5875cs
dc.identifier.orcid0000-0002-2943-9864cs
dc.identifier.orcid0000-0001-9587-5843cs
dc.identifier.orcid0000-0002-0234-3467cs
dc.identifier.other166142cs
dc.identifier.researcheridAAY-4689-2020cs
dc.identifier.researcheridQ-1628-2018cs
dc.identifier.researcheridQ-2440-2015cs
dc.identifier.scopus57188564285cs
dc.identifier.scopus56338516900cs
dc.identifier.scopus25621858200cs
dc.identifier.urihttp://hdl.handle.net/11012/201779
dc.language.isoencs
dc.publisherIOP Publishingcs
dc.relation.ispartofIOP Conference Series: Materials Science and Engineeringcs
dc.relation.urihttps://iopscience.iop.org/article/10.1088/1757-899X/1039/1/012004cs
dc.rightsCreative Commons Attribution 3.0 Unportedcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1757-8981/cs
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/cs
dc.subjectPortland cementen
dc.subjectHydrationen
dc.subjectZincen
dc.subjectHeavy metalsen
dc.subjectIsoperibolic calorimetryen
dc.titleNegative effect of Zinc compounds on hydration kinetics of ordinary Portland cementen
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-166142en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:38:21en
sync.item.modts2025.01.17 15:23:36en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav chemie materiálůcs
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