Evaluation of Mechanical and Microstructural Properties of Engineered Geopolymer Composites with Construction and Demolition Waste-Based Matrices

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dc.authoridkul, anil/0000-0003-4985-0797
dc.authoridGunal, Muhammed faruk/0000-0003-3572-8141
dc.authoridOZEL, BEHLUL FURKAN/0000-0002-7077-7160
dc.authoridOzcelikci, emircan/0000-0002-6112-9735
dc.contributor.authorKul, Anil
dc.contributor.authorOzcelikci, Emircan
dc.contributor.authorOzel, Behlul Furkan
dc.contributor.authorGunal, Muhammed Faruk
dc.contributor.authorYildirim, Gurkan
dc.contributor.authorBayer, Ismail Raci
dc.contributor.authorDemir, Ilhami
dc.date.accessioned2025-01-21T16:40:39Z
dc.date.available2025-01-21T16:40:39Z
dc.date.issued2024
dc.departmentKırıkkale Üniversitesi
dc.description.abstractThe main purpose of this work was to combine the advantages of increased material greenness, waste upcycling, reduced raw material demand, and the superior characteristics of traditional engineered cementitious composites (ECCs). To this end, engineered geopolymer composites (EGCs) with matrices based entirely on components from construction and demolition waste (CDW) as precursors and aggregates were developed. The CDW-based precursors included roof tiles, red clay bricks, hollow bricks, glass, and concrete. Different combinations of sodium hydroxide, sodium silicate, and calcium hydroxide were used as alkaline activators. Hybridized polyethylene and nylon fibers were used as fibers. To investigate the influences of the additional calcium source, slag-substituted versions of the same mixtures were produced. At the fresh state, Marsh cone and mini-slump tests were performed. At the hardened state, mechanical property tests (compressive strength and four-point bending) and microstructural characterization tests (X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy) were conducted. The findings revealed that, regardless of the mixture composition, all EGCs exhibited a deflection-hardening response coupled with multiple microcracking behavior. The 28-day average ranges for compressive strength, flexural strength, and midspan deflection results were 25.2-42.1 MPa, 6.2-9.5 MPa, and 14.1-28.3 mm, respectively. Slag substitution mostly improved the mechanical performance of EGCs. The main geopolymerization products were sodium aluminosilicate hydrate (NASH), calcium aluminosilicate hydrate (CASH), and C-(N)-ASH gels, the formation of which varied depending on the type of precursor and activator.
dc.description.sponsorshipScientific and Technical Research Council of Turkey (TUBITAK) [117M447]
dc.description.sponsorshipThe authors gratefully acknowledge the financial assistance of the Scientific and Technical Research Council of Turkey (TUBITAK) provided under Project 117M447.
dc.identifier.doi10.1061/JMCEE7.MTENG-15918
dc.identifier.issn0899-1561
dc.identifier.issn1943-5533
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85176143179
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1061/JMCEE7.MTENG-15918
dc.identifier.urihttps://hdl.handle.net/20.500.12587/24737
dc.identifier.volume36
dc.identifier.wosWOS:001283429700008
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAsce-Amer Soc Civil Engineers
dc.relation.ispartofJournal of Materials In Civil Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241229
dc.subjectEngineered geopolymer composites (EGC); Construction and demolition waste (CDW); Mechanical property; Microstructure
dc.titleEvaluation of Mechanical and Microstructural Properties of Engineered Geopolymer Composites with Construction and Demolition Waste-Based Matrices
dc.typeArticle

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