Nanomaterial and fiber-reinforced sustainable geopolymers: A systematic critical review

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dc.authoridAyough, Pouria/0000-0001-9187-1319
dc.contributor.authorUnal, M. T.
dc.contributor.authorGokce, H. S.
dc.contributor.authorAyough, P.
dc.contributor.authorAlnahhal, A. M.
dc.contributor.authorSimsek, O.
dc.contributor.authorNehdi, M. L.
dc.date.accessioned2024-10-04T18:52:31Z
dc.date.available2024-10-04T18:52:31Z
dc.date.issued2023
dc.departmentBayburt Üniversitesien_US
dc.description.abstractGlobal cement production is associated with a colossal environmental footprint due to its considerable carbon emissions, energy consumption, depletion of natural resources, and waste accumulation. Geopolymer based concretes (GCs) have emerged as revolutionary alternatives to ordinary Portland cement concrete with enormous potential ecological benefits. However, they suffer from deficiencies, such as their brittle behavior under flexural and tensile loads. Using different types of fiber reinforcement and nanomaterial additions in geopolymer composites (GCs) has recently gained considerable attention to enhance various engineering properties, improve crack resistance, toughness, and ductility of the geopolymer matrices. This systematic and critical review analyses the effects of different reinforcing fibers and nanomaterials on the compressive and tensile strengths, modulus of elasticity, and impact resistance of GCs, and highlights the associated microstructural features. It is shown that carbon, basalt, and steel fibers can impart considerable improvement in mechanical strength, modulus of elasticity, and impact resistance of GCs. Furthermore, the introduction of polyethylene fibers has been shown to induce complex cracking behaviors, thereby contributing to the strain-hardening capability of geopolymer matrices. The integration of nanomaterials into GCs has emerged as a powerful strategy for achieving substantial enhancements in mechanical performance. Optimal nanomaterial dosages, typically around 2%, have been identified, with the specific surface area of nanoparticles proving to be a crucial determinant of the resulting mechanical properties. Notably, nano-silica has exhibited pronounced macro-scale reinforcement effects, whereas nano-titanium has displayed the potential to significantly enhance gel micromechanical characteristics. Additionally, synergistic combinations of nanomaterials and fiber reinforcements have led to the development of novel and distinctive mechanical properties within GCs. The synthesis of these findings underscores current best practices, highlights areas requiring further investigation, and emphasizes the need for concerted research efforts to advance the knowledge and implementation of sustainable geopolymers. This review offers a comprehensive analysis of the effects of fiber reinforcements and nanomaterials on geopolymer composites, providing valuable insights for researchers and practitioners.en_US
dc.identifier.doi10.1016/j.conbuildmat.2023.133325
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.scopus2-s2.0-85171747840en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.conbuildmat.2023.133325
dc.identifier.urihttp://hdl.handle.net/20.500.12403/3512
dc.identifier.volume404en_US
dc.identifier.wosWOS:001075921500001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofConstruction and Building Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectGeopolymersen_US
dc.subjectMechanical propertiesen_US
dc.subjectFibersen_US
dc.subjectNanomaterialsen_US
dc.titleNanomaterial and fiber-reinforced sustainable geopolymers: A systematic critical reviewen_US
dc.typeReview Articleen_US

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