Strength Properties of Coffee Waste Based Geopolymers

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dc.contributor.authorEskisar, T.
dc.contributor.authorAltun, S.
dc.date.accessioned2020-12-01T11:52:17Z
dc.date.available2020-12-01T11:52:17Z
dc.date.issued2021
dc.departmentEge Üniversitesien_US
dc.description2nd International Conference on Environmental Geotechnology,Recycled Waste Materials and Sustainable Engineering, EGRWSE 2019 -- 16 June 2019 through 20 June 2019 -- -- 248969en_US
dc.description.abstractA considerable amount of coffee waste is disposed in the landfills annually. This study aims to investigate the possible use of coffee waste based geopolymers as a green construction material for landfills. Coffee is an organic and a biodegradable material. In order to use coffee waste as a construction material, the strength development of a coffee-based geopolymer was observed. Fly ash or rice husk ash were used as a precursor. These precursors were preferred because they are silica and alumina rich materials. Alkaline activator formed of sodium silicate and sodium hydroxide (Na2SiO3–NaOH) was used to trigger the geopolymerization process. Three variables were tested, the ratio of Na2SiO3–NaOH; effect of ash type, and curing time on the strength development of coffee-based geopolymers. By adding 30% of ash into coffee waste, a geopolymer was synthesized with an activator/ash ratio of 1.7 and Na2SiO3–NaOH ratio of 90–10%, which provided the highest (up to 1000 kPa) unconfined compressive strengths. This paper denotes that the coffee based-geopolymerization products will further develop the organic material into a nondegradable material, therefore suggesting geopolymers as an option to stabilize highly organic soils. © 2021, Springer Nature Switzerland AG.en_US
dc.identifier.doi10.1007/978-3-030-51354-2_12
dc.identifier.endpage136en_US
dc.identifier.isbn9783030513535
dc.identifier.issn2366-2557
dc.identifier.issn2366-2557en_US
dc.identifier.scopus2-s2.0-85092086905en_US
dc.identifier.scopusqualityQ4en_US
dc.identifier.startpage129en_US
dc.identifier.urihttps://doi.org/10.1007/978-3-030-51354-2_12
dc.identifier.urihttps://hdl.handle.net/11454/61487
dc.identifier.volume90en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer Science and Business Media Deutschland GmbHen_US
dc.relation.ispartofLecture Notes in Civil Engineeringen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCoffee wasteen_US
dc.subjectGeopolymeren_US
dc.subjectUnconfined compressive strengthen_US
dc.titleStrength Properties of Coffee Waste Based Geopolymersen_US
dc.typeConference Objecten_US

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