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dc.creatorIlić, Biljana
dc.creatorMitrović, Aleksandra
dc.creatorMiličić, Ljiljana
dc.creatorZdujić, Miodrag
dc.date.accessioned2018-09-04T12:57:59Z
dc.date.available2018-09-04T12:57:59Z
dc.date.issued2018
dc.identifier.issn0950-0618
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/3700
dc.description.abstractThe effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd
dc.publisherElsevier
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/36017/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45001/RS//
dc.rightsrestrictedAccess
dc.sourceConstruction and Building Materials
dc.subjectautoclave curing
dc.subjectcement-based composites
dc.subjectmechanically activated kaolin
dc.subjectmicrostructure
dc.subjectordinary curing
dc.titleCompressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins
dc.typearticleen
dc.rights.licenseARR
dcterms.abstractМиличић, Љиљана; Здујић, Миодраг; Илић, Биљана; Митровић, Aлександра;
dc.citation.spage92
dc.citation.epage101
dc.citation.volume178
dc.identifier.wos000437076700010
dc.identifier.doi10.1016/j.conbuildmat.2018.05.144
dc.identifier.scopus2-s2.0-85048722273
dc.type.versionpublishedVersion


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