Internal erosion and permeability of Na CMC-treated and PAM-treated geosynthetic clay liners

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dc.contributor.authorÖzhan, Hakkı O.
dc.contributor.authorErkal, Aykut
dc.date.accessioned2023-11-07T12:29:55Z
dc.date.available2023-11-07T12:29:55Z
dc.date.issued2023en_US
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, İnşaat Mühendisliği Bölümüen_US
dc.description.abstractThis paper investigates the occurrence of internal erosion and the variation of the permeability of geosynthetic clay liner (GCL) with respect to its geotextile component, polymer type and polymer amount added to its bentonite component, hydraulic head, and subgrade material by performing extensive triaxial permeability tests on the GCL specimens. To do this, Na carboxymethyl cellulose (CMC) and polyacrylamide (PAM) were treated with the bentonite component of the GCLs. Then, the GCLs were placed over poorly graded gravel (GP) and poorly graded sand (SP). Consequently, they were tested with two different woven geotextile components under the hydraulics heads of 0.3 m and 10 m. Results showed that only GCLs tested with woven geotextile, having lower tensile strength, lower mass/area and lower thickness over the gravel at a hydraulic head of 10 m, experienced internal erosion. Critically, Na CMC and PAM treatment caused 2-2.5 orders of magnitude decrease in the permeability. Actually, 2% Na CMC and 1% PAM treatment by dry mass were found to be the optimum polymer contents. Both the environmentally friendly biopolymer Na CMC and the synthetic polymer PAM can effectively be treated with Ca bentonite to enhance the hydraulic performance of the GCLs.en_US
dc.identifier.citationOzhan, H. O., & Erkal, A. (2023). Internal erosion and permeability of Na CMC-treated and PAM-treated geosynthetic clay liners. Geotextiles and Geomembranes, 51(6), 17-27.en_US
dc.identifier.endpage27en_US
dc.identifier.issn0266-1144
dc.identifier.issn1879-3584
dc.identifier.issue6en_US
dc.identifier.scopus2-s2.0-85167965128
dc.identifier.scopusqualityQ1
dc.identifier.startpage17en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12939/4216
dc.identifier.volume51en_US
dc.identifier.wosWOS:001083299500001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorErkal, Aykut
dc.language.isoen
dc.relation.ispartofGeotextiles and Geomembranes
dc.relation.isversionof10.1016/j.geotexmem.2023.08.002en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBiopolymeren_US
dc.subjectGeosynthetic clay lineren_US
dc.subjectInternal erosionen_US
dc.subjectNa CMCen_US
dc.subjectPAMen_US
dc.subjectPermeabilityen_US
dc.titleInternal erosion and permeability of Na CMC-treated and PAM-treated geosynthetic clay liners
dc.typeArticle

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