Effect of chitosan bio-polymer stabilization on the mechanical and dynamic characteristics of marl soils

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dc.authoridNasehi, Sayed Alireza/0000-0002-7019-4846
dc.contributor.authorJamshidi, Mojtaba
dc.contributor.authorMokhberi, Mehdi
dc.contributor.authorVakili, Amir Hossein
dc.contributor.authorNasehi, Alireza
dc.date.accessioned2024-09-29T16:00:50Z
dc.date.available2024-09-29T16:00:50Z
dc.date.issued2023
dc.departmentKarabük Üniversitesien_US
dc.description.abstractThe strength of marl soils decreases drastically in the variation of the water content. This has caused such soil to be introduced as problematic soil in geotechnical projects. In the present study, the effect of chitosan biopolymer on the static and dynamic properties of marl soil was investigated. To this end, different amounts of chitosan (up to 0.16%) were mixed with marl soil. Then samples were cured for 7, 28 and 90 days and finally subjected to 0, 1, 4 and 8Freeze-Thaw (F-T) cycles. Unconfined compressive strength (UCS), direct shear, Ultrasonic Pulse Velocity (UPV) and bender element tests were performed on the samples. The results showed that the UCS of the samples stabilized with 0.16% chitosan (as the optimal composition) increased by 227% after 7 days compared to that of unstabilized soil. Moreover, the values of cohesion and internal friction angle for the optimum mixture after 7 days of curing were equal to 38.76 kPa and 21.07 degrees, which was much higher than 21 kPa and 18.26 degrees related to the unstabilized marl soil. Chitosan was able to increase dynamic characteristics such as shear wave velocity and maximum shear modulus of samples by about 51 and 128% after 7 days of curing even after 8F-T cycles compared to those of unstabilized samples. Finally, chitosan exhibited that it can be a suitable alternative to traditional additives as an environmentally-friendly material, as confirmed by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) analyses.en_US
dc.identifier.doi10.1016/j.trgeo.2023.101110
dc.identifier.issn2214-3912
dc.identifier.scopus2-s2.0-85171432432en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.trgeo.2023.101110
dc.identifier.urihttps://hdl.handle.net/20.500.14619/5387
dc.identifier.volume42en_US
dc.identifier.wosWOS:001079809600001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofTransportation Geotechnicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectMarl soilen_US
dc.subjectChitosanen_US
dc.subjectBio-polymeren_US
dc.subjectStabilizationen_US
dc.subjectBender elementen_US
dc.subjectDynamic characteristicsen_US
dc.titleEffect of chitosan bio-polymer stabilization on the mechanical and dynamic characteristics of marl soilsen_US
dc.typeArticleen_US

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