Experimental and numerical analysis of shear behaviour at the interface geopolymer mortar and sand

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dc.contributor.authorBayindir, Furkan
dc.contributor.authorEkinci, Enes
dc.contributor.authorSarici, Talha
dc.contributor.authorOzmen, Alper
dc.date.accessioned2026-04-04T13:34:41Z
dc.date.available2026-04-04T13:34:41Z
dc.date.issued2026
dc.departmentİnönü Üniversitesi
dc.description.abstractThis study aimed to examine the impact of various production parameters on the shear performance at the interface between geopolymer mortar (GPM) and sand soil. Initially, the effects of varying NaOH concentrations (5, 10 and 15 M), aggregate types (stream aggregates (SA), crushed stone aggregates (CS) and construction and demolition waste (CDW) aggregates) and alkali/binder ratios (0.5 and 0.6) on GBFS-based GPM specimens were investigated. For this purpose, compressive strength, water absorption and ultrasonic pulse velocity (UPV) tests were carried out on GPM samples cured for 28 days. The maximum 28-day compressive strength (43.6 MPa) and the minimum water absorption (3.78%) were observed in GPM specimens activated with 15 M NaOH, produced with CS, water-cured and cast at an alkali/binder ratio of 0.5. Experimental findings revealed that the effects of aggregate type on high mechanical and low permeability properties were graded as CS > SA > CDW. Additionally, UPV test results showed positive correlation with compressive strength and water absorption values. Subsequently, the shear performance between GPM and sand soil were determined by using shear box test. In direct shear experiments, decreasing the alkali/binder ratio from 0.6 to 0.5 and the usage of CS increased the sand-GPM friction angle. Moreover, numerical modelling was employed to analysed soil-GPM interaction using the finite element method (FEM) in ABAQUS. FEM results showed that the obtained numerical findings demonstrated strong consistency with experimental data, capturing force-displacement trends therefore the numerical model can be used for parametric studies.
dc.description.sponsorshipInn niversitesi [Project ID: 4127]
dc.description.sponsorshipThe authors will receive funding from the Inonu University Scientific Research Project Unit (Project ID: 4127).
dc.identifier.doi10.1038/s41598-025-33002-w
dc.identifier.issn2045-2322
dc.identifier.issue1
dc.identifier.pmid41620484
dc.identifier.scopus2-s2.0-105029011917
dc.identifier.scopusqualityN/A
dc.identifier.urihttps://doi.org/10.1038/s41598-025-33002-w
dc.identifier.urihttps://hdl.handle.net/11616/109328
dc.identifier.volume16
dc.identifier.wosWOS:001679149500004
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherNature Portfolio
dc.relation.ispartofScientific Reports
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250329
dc.subjectGeopolymer
dc.subjectCompressive strength
dc.subjectShear box
dc.subjectFinite element method
dc.subjectShear behaviour
dc.subjectUPV analysis
dc.titleExperimental and numerical analysis of shear behaviour at the interface geopolymer mortar and sand
dc.typeArticle

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