Geotechnical evaluation of Ankara clay as a compacted clay liner

Met, Ilker
Akgün, Haluk
This study investigates the geotechnical properties, and mineralogical and permeability characteristics of "Ankara clay" to evaluate its suitability as a compacted clay landfill liner material. The geotechnical index properties of the clayey soil samples collected from the western part of Ankara were determined. All the soil samples were tested for permeability by means of falling head compaction permeameter apparatus. The mineralogy of the soil samples were examined by X-ray diffraction and scanning electron microscope analyses. The cation exchange capacities of the soil samples were determined by the methylene blue adsorption test in order to determine the presence of swelling clay minerals in the soil samples. The influences of the geotechnical indices and mineralogy of Ankara clay on the hydraulic conductivity were investigated. Several landfill profiles containing various compacted clayey lining systems were simulated by the Hydrologic Evaluation of Landfill Performance model. All the soil samples tested led to hydraulic conductivities lower than the suggested regulatory limits (1 x 10(-9) m/s) and therefore, are suitable to be utilized as compacted clay liners in potential sanitary landfill sites. Recommendations regarding field construction of the compacted clay liner are provided.


Utilization of Ankara Clay for Sanitary Landfill Bottom Liners Turkey
Akgün, Haluk (2005-01-01)
This study aims at determining the geotechnical properties and the compaction permeability characteristics of a clayey soil sample obtained from the Göbaşi site of the Ankara region in an attempt to assess its suitability as a compacted clay liner. The soil sample was permeability tested at about 3% wet of its optimum moisture content using the falling head compaction permeameter apparatus. The expected leakage rates through clay-only and composite geomem-brane-clay liners constructed with compacted Ankara ...
Geotechnical Properties and Permeability of Compacted Clay in the Gölbaşı Region Ankara
Akgün, Haluk (null; 2016-04-06)
This study evaluated the geotechnical properties and permeability of compacted clayey foundation soils in the Gölbaşı region of Ankara to determine their suitability as a compacted landfill liner material. The results of the tests showed that the clay was suitable to be used as a compacted clay landfill liner material. Copyright of Journal of Solid Waste Technology & Management is the property of Journal of Solid Waste Technology & Management and its content may not be copied or emailed to multiple sites or...
Composite landfill liner design with Ankara clay, Turkey
Met, İlker; Akgün, Haluk (Springer Science and Business Media LLC, 2005-04-01)
This study presents an overview of the geotechnical properties of the clayey soils, referred to as "Ankara clay", at two sites of the Ankara region in an attempt to design a landfill profile composed of a high density polyethylene (HDPE) geomembrane/clay composite liner through the Hydrologic Evaluation of Landfill Performance (HELP) model and the Water Balance Method. The geotechnical properties of the landfill layers along with the water balance factors (i.e., evapotranspiration, precipitation, temperatur...
Geotechnical rock-mass evaluation of the Anamur dam site, Turkey
Ozsan, A; Karpuz, Celal (Elsevier BV, 1996-03-01)
This paper describes a feasibility-level geotechnical evaluation carried out at Anamur dam site, in terms of stability analysis of dam foundation, excavation slopes and a diversion tunnel. The proposed Anamur dam will be built across the Anamur river on the Alanya metamorphic series which consists of phyllite, schist and slate units at the site. Geotechnical investigations included drilling for core, pumping tests, sampling for laboratory testing, and a detailed discontinuity survey.
Geotechnical Assessment of Compacted Sand Bentonite Mixtures to be Utilized in Underground Nuclear Waste Repositories and Barrier Design
Akgün, Haluk; Koçkar, Mustafa Kerem (2016-07-01)
This study assesses the mechanical and hydrological performance of compacted sand bentonite mixtures to be utilized in sealing underground nuclear waste repositories. In order to assess the performance of this material and to obtain an optimum sand bentonite mixture, a variety of laboratory tests, namely, compaction, falling head permeability, swelling, unconfined compression and shear strength tests were performed on sand bentonite mixtures possessing bentonite contents ranging from 5% to 15%. Sand bentoni...
Citation Formats
I. Met and H. Akgün, “Geotechnical evaluation of Ankara clay as a compacted clay liner,” ENVIRONMENTAL EARTH SCIENCES, pp. 2991–3006, 2015, Accessed: 00, 2020. [Online]. Available: