15 research outputs found
Comparison of natural, polymer treated, and sodium activated Ca-bentonites
Get PDFThe hydraulic conductivity of geosynthetic clay liners (GCLs) for the confinement of waste disposal facilities depends on the hydraulic conductivity of the bentonite clay encased between the two geotextiles. Sodium bentonites are widely used for GCLs due to their low hydraulic conductivity to water. Although, calcium bentonites (Ca-bentonites) are low cost and readily available, the hydraulic conductivity of calcium bentonites is higher compared to that of sodium bentonites (Na-bentonites). This study compares the impact of the treatment of Ca-bentonite with an anionic polymer, sodium carboxymethyl cellulose (Na-CMC) using HYPER clay technology, relative to standard sodium activation treatment. The swelling ability and hydraulic conductivity to CaCl2 solutions of a natural (untreated) Ca-bentonite was compared to those of sodium activated bentonite and to polymer treated bentonite. Test results showed the superior performance of the polymer treatment compared to sodium activation
Deformation of Geosynthetic Reinforced Soil Structures by Design, in the Lab and in the Field
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Altered geosynthetic clay liners: effect on the hydraulic performance of composite liners
No full textEffect of Municipal Solid Waste Incineration Fly Ash Leachate on the Hydraulic Performance of a Geosynthetic Clay Liner
No full textGeosynthetic clay liners: effect of structural properties and additives on hydraulic performance and durability
No full textStress in the classroom? Process analysis of interaction effects between instructional demands and students’ resource appraisals on physiological and psychological symptoms of stress among vocational students
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