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dc.contributor.authorYildirim, Gurkan
dc.contributor.authorAshour, Ashraf
dc.contributor.authorOzcelikci, E.
dc.contributor.authorGunal, M.F.
dc.contributor.authorOzel, B.F.
dc.contributor.authorAlhawat, Musab M.
dc.date.accessioned2023-11-15T15:09:39Z
dc.date.available2023-11-15T15:09:39Z
dc.date.issued2023-09
dc.identifier.citationYilidirim G, Ashour A, Ozcelikci E et al (2023) Development of ambient-cured geopolymer mortars with construction and demolition waste-based materials. NanoWorld Journal. 9(S2): S40-S45.en_US
dc.identifier.urihttp://hdl.handle.net/10454/19679
dc.descriptionYesen_US
dc.description.abstractDegrading infrastructure and applications of structural demolition create tremendous amounts of construction and demolition waste (CDW) all around the world. To address this issue in an effective way, recycling CDW in a most appropriate way has become a global concern in recent years. To this end, this study focused on the valorization of CDW-based materials such as tile, bricks, glass, and concrete in the development of geopolymer mortars. CDWs were first collected from demolition zone and then subjected to crushing-milling operations. To investigate the influence of slag (S) addition to the mixtures, 20% S substituted mixture designs were also made. Fine recycled concrete aggregates (FRCA) obtained from crushing and sieving of the waste concrete were used as the aggregate. A series of mixtures were designed using different proportions of three distinct alkali activators such as sodium hydroxide (NaOH), sodium silicate (Na2SiO3), and calcium hydroxide (CH; Ca(OH)2). To improve their applicability, the mixtures were left to cure at room temperature rather than the heat curing which is frequently applied in the literature. After 28 days ambient curing, the 100% CDW-based geopolymer mortar activated with three different activators reached a compressive strength of 31.6 MPa, whereas the 20% S substituted geopolymer mortar showed a 51.9 MPa compressive strength. While the geopolymer mortars activated with only NaOH exhibited poor performance, it was found that the use of Na2SiO3 and CH improved the mechanical performance. Main geopolymerization products were related to NASH (Sodium alumino-silicate hydrate), CASH (Calcium alumino-silicate hydrate), and C(N)ASH gel formations. Results demonstrated that mixed CDWs can be employed in the manufacturing geopolymers, making them potential alternatives to Portland cement (PC)-based systems by being eco-friendly, energy-efficient, and comparable in compressive strength.en_US
dc.description.sponsorshipThis project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 894100.en_US
dc.language.isoenen_US
dc.rights© 2023 Yildirim et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CCBY) (http://creativecommons.org/ licenses/by/4.0/) which permits commercial use, including reproduction, adaptation, and distribution of the article provided the original author and source are credited. Published by United Scientific Group.en_US
dc.subjectConstruction and demolition wasteen_US
dc.subjectAmbient curingen_US
dc.subjectGeopolymeren_US
dc.subjectCompressive strengthen_US
dc.subjectMicrostructureen_US
dc.titleDevelopment of ambient-cured geopolymer mortars with construction and demolition waste-based materialsen_US
dc.status.refereedYesen_US
dc.date.Accepted2023-09-19
dc.date.application2023-09-22
dc.typeArticleen_US
dc.type.versionPublished versionen_US
dc.identifier.doihttps://doi.org/10.17756/nwj.2023-s2-008
dc.rights.licenseCC-BYen_US
refterms.dateFOA2023-11-15T15:09:39Z
dc.openaccess.statusopenAccessen_US


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