High-Temperature Resistance of Industrial Waste-Based Lightweight Geopolymer Mortars Produced Using Microwave Technology

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dc.contributor.authorTokdemir, Merve
dc.contributor.authorRamyar, Kambiz
dc.contributor.authorGultekin, Adil
dc.date.accessioned2025-10-11T20:48:39Z
dc.date.available2025-10-11T20:48:39Z
dc.date.issued2024
dc.departmentDüzce Üniversitesien_US
dc.description.abstractThe production of microwave-cured lightweight geopolymers has been investigated; however, the durability properties of these materials, particularly the high-temperature resistance, remain an area requiring further investigation. This study examined the high-temperature resistance of fly ash- and brick powder-based lightweight geopolymer mortars. For this purpose, hydrogen peroxide (Hp) was used as a foaming agent at dosages of 0.5%, 1.0%, and 1.5% by the weight of aluminosilicate, and expanded polystyrene (EPS) beads were used as lightweight aggregate at dosages of 0.2%, 0.4%, and 0.8% by the weight of aluminosilicate. Curing was carried out using a conventional laboratory oven (90 degrees C for 48 h) and a household microwave oven at a power level of 300 watts (20 min for fly ash and 30 min for brick powder). Sodium silicate and sodium hydroxide were used as alkali activators, and pumice aggregate with a maximum particle size of 4.75 mm was utilized for mortar mixtures. The results showed that unit weights and compressive strengths decreased with the inclusion of Hp and EPS. While the oven-cured reference mortars lost strength after exposure to 1000 degrees C, the compressive strengths of mortars containing EPS and Hp increased. The compressive strength of all microwave-cured mortar series increased after high-temperature exposure. With the use of Hp and EPS, compressive strength increases of up to 373% were observed after exposure to 1000 degrees C. These strength increases were attributed to continued geopolymerization under the influence of high temperature and new crystal formations as evidenced by XRD analysis.en_US
dc.identifier.doi10.1007/s13369-024-09756-2
dc.identifier.issn2193-567X
dc.identifier.issn2191-4281
dc.identifier.scopus2-s2.0-85209144976en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1007/s13369-024-09756-2
dc.identifier.urihttps://hdl.handle.net/20.500.12684/22036
dc.identifier.wosWOS:001355329800001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer Heidelbergen_US
dc.relation.ispartofArabian Journal For Scienceand Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmzKA_WOS_20250911
dc.subjectLightweight geopolymeren_US
dc.subjectHigh-temperature resistanceen_US
dc.subjectMicrowave curingen_US
dc.subjectFoaming agenten_US
dc.subjectLightweight aggregateen_US
dc.titleHigh-Temperature Resistance of Industrial Waste-Based Lightweight Geopolymer Mortars Produced Using Microwave Technologyen_US
dc.typeArticleen_US

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