Optimization of fly ash particle size distribution for cementitious systems with high compactness

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dc.contributor.authorSevim, Ozer
dc.contributor.authorDemir, Ilhami
dc.date.accessioned2020-06-25T18:34:22Z
dc.date.available2020-06-25T18:34:22Z
dc.date.issued2019
dc.departmentKırıkkale Üniversitesi
dc.descriptionSevim, Ozer/0000-0001-8535-2344; Demir, Ilhami/0000-0002-8230-4053
dc.description.abstractCompactness is of special importance for aggregates in concrete; however, the particle-size distribution (gradation) of powdery ingredients is commonly disregarded especially for pozzolanic materials such as fly ash. Without good gradation, powdery materials will result in higher void ratios, as in the case of aggregates, and the products obtained after hydration will still have some voids. Using a vacuum sieve, this study found the particle-size-distribution of fly ash in accordance with the Dinger-Funk particle-size distribution modulus, q, and explored the effects of various fly ash particle-size distributions on the compressive and flexural strengths of 7-, 28- and 90-day-old fly ash-blended cement mortars. After defining the optimal size distribution, the mechanical properties of cement mortars were assessed for several fly ash replacement levels. Results reveal that q of 0.4 yields the best mechanical property results. Further, the cement mortar with a 20% fly ash replacement level and a previously optimized particle-size distribution offered improved mechanical properties and high-compactness results over the control cement mortar after 90 days. Experimental results clearly indicate that only by properly adjusting the particle size distribution of fly ash used in the mixtures, better mechanical properties than the control mixtures without any fly ash addition can be achieved at a fly ash replacement ratio of 20%. The findings of current study are believed to greatly contribute to new lines of research on more effective replacement techniques for different pozzolanic materials without risking basic properties expected from cement-based materials. (C) 2018 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipScientific and Technical Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [215M081]en_US
dc.description.sponsorshipThe authors gratefully acknowledge the financial assistance of the Scientific and Technical Research Council of Turkey (TUBITAK) provided under Project: 215M081.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1016/j.conbuildmat.2018.11.080
dc.identifier.endpage114en_US
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.scopus2-s2.0-85056445929
dc.identifier.scopusqualityQ1
dc.identifier.startpage104en_US
dc.identifier.urihttps://doi.org/10.1016/j.conbuildmat.2018.11.080
dc.identifier.urihttps://hdl.handle.net/20.500.12587/7881
dc.identifier.volume195en_US
dc.identifier.wosWOS:000457659600010
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofConstruction And Building Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCementitious systemsen_US
dc.subjectFly ashen_US
dc.subjectParticle size distributionen_US
dc.subjectHigh compactnessen_US
dc.subjectCompressive strengthen_US
dc.subjectFlexural strengthen_US
dc.titleOptimization of fly ash particle size distribution for cementitious systems with high compactnessen_US
dc.typeArticle

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