Sustainable use of waste hazelnut shell ash in road construction to stabilize expansive subgrade

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dc.authorid0000-0001-7096-5770en_US
dc.authorid0000-0002-8507-2825en_US
dc.authorid0000-0003-3198-3508en_US
dc.contributor.authorTanyıldızı, Muhammed
dc.contributor.authorNasıroğlu, Sema
dc.contributor.authorZeybek, Abdulhakim
dc.contributor.authorGökalp, İslam
dc.date.accessioned2024-11-08T16:41:29Z
dc.date.available2024-11-08T16:41:29Z
dc.date.issued2024en_US
dc.departmentDicle Üniversitesi, Fen Bilimleri Enstitüsü, İnşaat Mühendisliği Ana Bilim Dalıen_US
dc.description.abstractExpansive (shrinkage-swelling) soils tend to suffer significant volume changes with fluctuations in moisture content. The volume instability of expansive soils causes considerable damage to the road pavements, resulting in significant economic losses. This study examines the usage of waste hazelnut shell ash (WHSA) as an alternative sustainable stabilizer to improve the geotechnical properties of expansive road subgrade soils. For this purpose, WHSA was added to expansive soil specimens prepared at ratios of 2%, 4%, 6%, 8%, and 10% by dry weight of the soil. Consistency limit, swell-shrink, compaction, unconfined compression strength (UCS), California Bearing Ratio (CBR), direct shear, fall cone, consolidation, and wetting-drying experiments were conducted to investigate the influence of WHSA on the physical, mechanical, and durability characteristics of expansive soil. The experimental results indicated that the addition of WHSA caused a reduction in the UCS and the undrained shear strength of the soil. On the other hand, the UCS of specimens containing WHSA appeared to steadily increase after they were cured for various periods ranging from 7 to 90 days. A significant reduction was observed in the plasticity and swell-shrink potential when WHSA increased from 0% to 10%. The CBR of the soil increased from 2.47% to 16.71% by adding 10% WHSA, indicating that the thickness of the subbase layer can be reduced by approximately 55%. The cohesion of the soil appeared to decrease, whereas the international friction angle increased. A considerable improvement was achieved in the wetting-drying performance of the soil by increasing the WHSA content. Moreover, the consolidation-induced settlement was reduced up to a certain WHSA ratio. These results show that the WHSA can be a reliable, environmentally friendly, and cost-effective alternative material for the stabilization of expansive road subgrade soils.en_US
dc.identifier.citationTanyıldızı, M., Nasıroğlu, S., Zeybek, A. ve Gökalp, İ. (2024). Sustainable use of waste hazelnut shell ash in road construction to stabilize expansive subgrade. Construction and Building Materials, 432, 1-15.en_US
dc.identifier.endpage15en_US
dc.identifier.issn0950-0618
dc.identifier.scopus2-s2.0-85193433848
dc.identifier.scopusqualityQ1
dc.identifier.startpage1en_US
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S095006182401804X?via%3Dihub
dc.identifier.urihttps://hdl.handle.net/11468/28944
dc.identifier.volume432en_US
dc.indekslendigikaynakScopus
dc.institutionauthorNasıroğlu, Sema
dc.language.isoenen_US
dc.publisherElsevier Ltd.en_US
dc.relation.ispartofConstruction and Building Materials
dc.relation.isversionof10.1016/j.conbuildmat.2024.136663en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectExpansive soilen_US
dc.subjectStabilizationen_US
dc.subjectSubgradeen_US
dc.subjectSustainabilityen_US
dc.subjectWaste hazelnut shell ashen_US
dc.titleSustainable use of waste hazelnut shell ash in road construction to stabilize expansive subgradeen_US
dc.titleSustainable use of waste hazelnut shell ash in road construction to stabilize expansive subgrade
dc.typeArticleen_US

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