Fracture behavior of alkali-activated basalt powder/slag systems reinforced with basalt and hybrid fibers

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dc.authoridAkturk, Busra/0000-0003-1484-7758
dc.authorwosidAkturk, Busra/JCO-1851-2023
dc.contributor.authorAkturk, Busra
dc.date.accessioned2024-07-18T20:49:08Z
dc.date.available2024-07-18T20:49:08Z
dc.date.issued2023
dc.departmentİstanbul Bilgi Üniversitesien_US
dc.description.abstractAlkali-activated materials are gaining attention as a sustainable alternative to cement-based materials over the past years and studies on their fracture response are scarce. This paper presents the fracture behavior of alkali-activated fiber-reinforced basalt powder/slag blend mortars. Fracture characteristics such as the fracture toughness-K-IC(ini) and K-IC(un)-of the alkali-activated basalt powder/slag mortar mixes were determined using the double-K fracture model. Basalt fibers and a combination of basalt + polypropylene fibers (hybrid) were used to enhance the fracture properties of the mixes, and it was found that the basalt powder/slag binary mortars achieved performance comparable with that of cement-based systems in terms of compressive strength, fracture toughness, and fracture energy. The alkali-activated basalt powder/slag mixes exhibited good mechanical performance, which as established previously was due to the beneficial silicium and calcium-based resources and the synergy between the basalt powder and the slag. Incorporating basalt fibers was effective in improving flexural strength and fracture toughness significantly, and they contributed much more than the hybrid fibers did. On the other hand, incorporating hybrid fibers improved the fracture energy significantly. The fiber-matrix interface and the fiber behavior under flexure were visualized using scanning electron microscopy. The fiber-matrix bonding mechanism showed that the polypropylene fibers tended to cluster, resulting in less-improved fracture toughness compared to that with basalt fibers. The outcomes of this study show that basalt powder/slag blends can be used as structural materials: they have fracture characteristics similar to those of cement-based systems and incorporating basalt and hybrid fibers improve their fracture characteristics.en_US
dc.description.sponsorshipIstanbul Bilgi University Research Foundation [2019.02.004]en_US
dc.description.sponsorshipAcknowledgementsThis study is carried out within the scope of the research project Alkali Activation of Basalt Powder: Fresh-state, Microstructure and Fracture Properties supported by Istanbul Bilgi University Research Foundation (Project Number: 2019.02.004).en_US
dc.identifier.doi10.1617/s11527-023-02139-3
dc.identifier.issn1359-5997
dc.identifier.issn1871-6873
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-85149382401en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1617/s11527-023-02139-3
dc.identifier.urihttps://hdl.handle.net/11411/8103
dc.identifier.volume56en_US
dc.identifier.wosWOS:000941202200001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofMaterials and Structuresen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectFractureen_US
dc.subjectBasalt Powderen_US
dc.subjectSlagen_US
dc.subjectAlkali-Activated Materialen_US
dc.subjectFiber Reinforcementen_US
dc.subjectBasalt Fiberen_US
dc.subjectQuasi-Brittle Fractureen_US
dc.subjectDouble-K Criterionen_US
dc.subjectMechanical-Propertiesen_US
dc.subjectFly-Ashen_US
dc.subjectCrack-Propagationen_US
dc.subjectSynthetic-Fibersen_US
dc.subjectConcreteen_US
dc.subjectPerformanceen_US
dc.subjectHydrationen_US
dc.subjectCementen_US
dc.titleFracture behavior of alkali-activated basalt powder/slag systems reinforced with basalt and hybrid fibers
dc.typeArticle

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