The use of Ankara Clay as a compacted clay liner for landfill sites
| Autor: | Gözde Pınar Yal, İlker Met, Haluk Akgün, Mustafa Kerem Koçkar, Asuman Günal Türkmenoğlu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Soil test
0211 other engineering and technologies Compaction Landfill liner 02 engineering and technology 010501 environmental sciences Atterberg limits engineering.material 01 natural sciences Hydraulic conductivity Geochemistry and Petrology Illite engineering Environmental science Kaolinite Geotechnical engineering Clay minerals 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Popis: | Because of the current need for new landfill sites in Ankara, the suitability of Ankara Clay as a liner material for landfill sites was investigated. A mineralogical and geotechnical database was created by compiling the results of previous tests by the present authors as well as those of tests performed in the present study. The mineralogical properties of the samples were investigated by X-ray diffraction, scanning electron microscopy and methylene blue adsorption. The cation exchange capacities (CEC) of the samples vary from 12 to 35 meq/100 g soil and the dominant clay minerals are illite, smectite and kaolinite. The geotechnical properties of the Ankara Clay samples that were assessed included specific gravity, the Atterberg limits (plastic limit, liquid limit, plasticity index), particle-size distribution, compaction properties (i.e.maximum dry density and optimum water content) and hydraulic conductivity. Because the hydraulic conductivity of the samples was lower than the acceptable limit of 1 × 10−9 m/s, it follows that, from a geotechnical perspective, Ankara Clay is a suitable material for use as a compacted clay landfill liner. The relationships between the mineralogical and geotechnical parameters that were investigated by regression analysis indicated that the hydraulic conductivity of the compacted soil samples decreased with increasing plasticity index, clay content, CEC, smectite content, smectite to illite ratio and decreasing illite content. According to the specifications for field construction of compacted clay liners, Ankara Clay is suitable for compaction in the field. |
| Databáze: | OpenAIRE |
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