Some Issues of Shrinkage-Reducing Admixtures Application in Alkali-Activated Slag Systems

Simple item page
dc.contributor.authorBílek, Vlastimilcs
dc.contributor.authorKalina, Lukášcs
dc.contributor.authorNovotný, Radoslavcs
dc.contributor.authorTkacz, Jakubcs
dc.contributor.authorPařízek, Ladislavcs
dc.coverage.issue6cs
dc.coverage.volume9cs
dc.date.issued2016-06-10cs
dc.description.abstractSignificant drying shrinkage is one of the main limitations for the wider utilization of alkali-activated slag (AAS). Few previous works revealed that it is possible to reduce AAS drying shrinkage by the use of shrinkage-reducing admixtures (SRAs). However, these studies were mainly focused on SRA based on polypropylene glycol, while as it is shown in this paper, the behavior of SRA based on 2-methyl-2,4-pentanediol can be significantly different. While 0.25% and 0.50% had only a minor effect on the AAS properties, 1.0% of this SRA reduced the drying shrinkage of waterglass-activated slag mortar by more than 80%, but it greatly reduced early strengths simultaneously. This feature was further studied by isothermal calorimetry, mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM). Calorimetric experiments showed that 1% of SRA modified the second peak of the pre-induction period and delayed the maximum of the main hydration peak by several days, which corresponds well with observed strength development as well as with the MIP and SEM results. These observations proved the certain incompatibility of SRA with the studied AAS system, because the drying shrinkage reduction was induced by the strong retardation of hydration, resulting in a coarsening of the pore structure rather than the proper function of the SRA.en
dc.formattextcs
dc.format.extent1-12cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMaterials . 2016, vol. 9, issue 6, p. 1-12.en
dc.identifier.doi10.3390/ma9060462cs
dc.identifier.issn1996-1944cs
dc.identifier.orcid0000-0003-3831-3443cs
dc.identifier.orcid0000-0001-8127-8175cs
dc.identifier.orcid0000-0002-1809-5875cs
dc.identifier.other125827cs
dc.identifier.researcheridAAB-9386-2022cs
dc.identifier.researcheridAAY-4689-2020cs
dc.identifier.scopus55255338000cs
dc.identifier.scopus57188564285cs
dc.identifier.urihttp://hdl.handle.net/11012/61755
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMaterialscs
dc.relation.urihttp://www.mdpi.com/1996-1944/9/6/462cs
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.subjectalkali activated slagen
dc.subjectshrinkage reducing admixtureen
dc.subjectshrinkageen
dc.subjecthydrationen
dc.subjectmicrostructureen
dc.subjectretardationen
dc.titleSome Issues of Shrinkage-Reducing Admixtures Application in Alkali-Activated Slag Systemsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-125827en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:37:42en
sync.item.modts2025.01.17 15:18:13en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. CMV - laboratoř anorganických materiálůcs
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Some Issues of ShrinkageReducing Admixtures Application in AlkaliActivated Slag Systems.pdf
Size:
3.88 MB
Format:
Adobe Portable Document Format
Description:
Some Issues of ShrinkageReducing Admixtures Application in AlkaliActivated Slag Systems.pdf
Download
Collections
CMV - laboratoř anorganických materiálů