Strength and abrasion performance of recycled aggregate based geopolymer concrete

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dc.authoridhttp://orcid.org/0000-0002-3480-0490en_US
dc.authoridhttp://orcid.org/0000-0002-0067-6436en_US
dc.authoridhttp://orcid.org/0000-0003-2744-7876en_US
dc.contributor.authorLakew, Asfaw Mekonnen
dc.contributor.authorAl-Mashhadani, Mukhallad M.
dc.contributor.authorCanpolat, Orhan
dc.date.accessioned2023-10-11T10:08:26Z
dc.date.available2023-10-11T10:08:26Z
dc.date.issued2022en_US
dc.departmentMühendislik ve Mimarlık Fakültesien_US
dc.description.abstractThis experimental work evaluated geopolymer concrete containing fly ash and slag by partial replacement of natural coarse aggregate (NCA) with recycled coarse aggregate (RCA) to manufacture environmental-friendly concrete. The proportion of recycled aggregates considered consists of 10%, 20%, 30%, and 40% of the total coarse aggregate amount. Also, a steel fiber ratio of 0.3% was utilized. The mechanical properties and abrasion resistance of fly ash/slag-based geopolymer concrete were then assessed. Majorly, the mechanical strength of the concrete samples decreased by the increase of RCA content. The geopolymer concrete with 40% RCA gave 28.3% lesser compressive strength and 24% lower splitting tensile strength than NCA concrete at one year. Also, the flexural strength of concrete specimens was reduced by 35% (from 5.34MPa to 3.5MPa) with the incorporation of 40% RCA. The incorporation of 30% RCA caused 23% and 22.6% reduction in compressive strength at 56 days and one year, respectively. The flexural and splitting tensile strength of the specimens was not significantly reduced (less than 10%) with the inclusion of a recycled coarse aggregate ratio of up to 30%. Furthermore, the abrasion wear thickness of every concrete sample was less than 1 mm. RCA inclusion of 20% produced either insignificant reduction or better strength results compared to reference mixtures. As a result, it was considered that the combination of 0.3% steel fiber and 20% recycled coarse aggregate in fly ash/slag-based geopolymer concrete leads to an ecofriendly concrete mix with acceptable short and long-term engineering properties that would lead to sustainability in concrete production and utilization sector.en_US
dc.identifier.doi10.14744/sigma.2021.00021en_US
dc.identifier.endpage161en_US
dc.identifier.issn1304-7205
dc.identifier.issn1304-7191
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-85135896854en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage155en_US
dc.identifier.urihttps://hdl.handle.net/11363/5838
dc.identifier.urihttps://doi.org/
dc.identifier.volume40en_US
dc.identifier.wosWOS:000777898300010en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorAl-Mashhadani, Mukhallad M.
dc.language.isoenen_US
dc.publisherYıldız Teknik Üniversitesien_US
dc.relation.ispartofSigma Journal of Engineering and Natural Sciences - Sigma Mühendislik ve Fen Bilimleri Dergisien_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
dc.subjectCompressive strengthen_US
dc.subjectsplitting tensile strengthen_US
dc.subjectFexural strengthen_US
dc.subjectAbrasion resistanceen_US
dc.subjectGeopolymer concreteen_US
dc.subjectRecycled aggregateen_US
dc.titleStrength and abrasion performance of recycled aggregate based geopolymer concreteen_US
dc.typeArticleen_US

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