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Strength And Hydraulic Conductivity Characteristics Of Sand - Bentonite Mixtures Designed As A Landfill Liner

Submitted2017-08-27
Last Update2017-08-27
TitleStrength And Hydraulic Conductivity Characteristics Of Sand - Bentonite Mixtures Designed As A Landfill Liner
Author(s)Author #1
Author title:
Name: Oluwapelumi Ojuri
Org: Federal University of Technology, Akure, Nigeria
Country:
Email: ooojuri@futa.edu.ng

Author #2
Author title:
Name: Opeyemi Oluwatuyi
Org: Engineer, Landmark University, Omu-Aran, Nigeria
Country:
Email: oluwatuyi.opeyemi@lmu.edu.ng

Other Author(s)
Contact AuthorAuthor #1
Alt Email: ooojuri@futa.edu.ng
Telephone:
KeywordsBentonite, California Bearing Ratio (CBR), Compacted landfill liner, Hydraulic conductivity, Igbokoda sand
AbstractCompacted sandy soils with addition of bentonite have been used in a variety of geotechnical structures as engineered barriers, such as in landfill liners and hydraulic containment structures. In this study, Igbokoda sand was mixed with bentonite at varying percentages of 0%, 2%, 4%, 6%, 8% and 10% by weight of sand. Strength tests, which include compaction test, California Bearing Ratio (CBR) test and direct shear test, were performed on various sand-bentonite mixtures using standard methods. Hydraulic conductivity tests were also performed on various sand-bentonite mixtures in order to determine their suitability as landfill liner. Results from the tests showed that 8% of bentonite with sand mixture had a hydraulic conductivity below 1�10-7 cm/s, a cohesion value of 250 kN/m3 and a reasonable strength (CBR) value of 54.07% using the West Africa standard compactive method, hence being the safest of the selected varying percentages for the design of a landfill liner.
Paperview paper 4051.pdf (216KB)

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