Fully reacted high strength geopolymer made with diatomite as a fumed silica alternative

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dc.authorid0000-0001-9931-0778
dc.contributor.authorBağcı, Cengiz
dc.contributor.authorKutyla, Gregory P.
dc.contributor.authorKriven, Waltraud M.
dc.date.accessioned2019-05-10T09:39:59Z
dc.date.available2019-05-10T09:39:59Z
dc.date.issued2017
dc.departmentHitit Üniversitesi, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü
dc.description.abstractGeopolymers are formed by mixing of aluminosilicate sources with alkaline meta-silicate solution at room temperature. In the current study, diatomite of Turkish origin was fully utilized as a fumed silica alternative for the preparation of geopolymer, having a typical formula of K2O•Al2O3•4SiO2•11H2O. From XRD of this sample, a broad peak centered at 28° 2? indicated the well-known formation of amorphous geopolymer, as well as a fully reacted microstructure of geopolymer as seen by scanning electron microscopy. Additionally, geopolymer having the same formula was made by using fumed silica, in order to compare with geopolymers prepared from diatomite. The Weibull modulus was calculated from four-point bending and compressive strength testing of both geopolymer composites. The use of diatomite as a fumed silica substitute in geopolymer production resulted in a very close flexure strength 9.2 (± 4.2 MPa) when compared to geopolymer made from fumed silica 10.2 (± 3.3 MPa). There was a significantly higher compressive strength 71 (± 13.9 MPa) and Weibull modulus (5.4), than comparable properties of geopolymer made from fumed silica, which had a compressive strength 54 (± 25.8 MPa) and Weibull modulus of 2.0. The discrepancy was attributed to some self-reinforcement of the geopolymer matrix due to unreacted diatomite. © 2017 Elsevier Ltd and Techna Group S.r.l.
dc.identifier.citationBağcı, C., Kutyla, G. P., Kriven, W. M. (2017). Fully reacted high strength geopolymer made with diatomite as a fumed silica alternative. Ceramics International, 43(17), 14784-14790.
dc.identifier.doi10.1016/j.ceramint.2017.07.222
dc.identifier.endpage14790en_US
dc.identifier.issn0272-8842
dc.identifier.issue17en_US
dc.identifier.scopusqualityQ1
dc.identifier.startpage14784en_US
dc.identifier.urihttps://doi.org/10.1016/j.ceramint.2017.07.222
dc.identifier.urihttps://hdl.handle.net/11491/820
dc.identifier.volume43en_US
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Ltd
dc.relation.ispartofCeramics International
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDiatomiteen_US
dc.subjectFumed Silicaen_US
dc.subjectGeopolymeren_US
dc.titleFully reacted high strength geopolymer made with diatomite as a fumed silica alternative
dc.typeArticle

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