Environmental geological and geotechnical investigations related to the potential use of Ankara clay as a compacted landfill liner material, Turkey

Met, İlker; Akgün, Haluk; Türkmenoğlu, Asuman Günal

doi:10.1007/s00254-004-1147-4

Cited by 26 publications

(6 citation statements)

References 10 publications

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“…10 -9 m/s in the USA; Met et al 2005). Finally, even though the Algiers plaisancian marls are often subject to instabilities, the weak slope (less than 3°) of the site excludes this possible hazard.…”

Section: Site Description and Local Geological Settingsmentioning

confidence: 95%

Evidence for an underground runoff and soil permeability at the Ouled Fayet (Algiers, Algeria) subsurface landfill pilot project from geophysical investigations

Djadia

Machane²,

Chatelain

et al. 2009

Environ Earth Sci

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International audienceResults from geophysical investigations (electrical resistivity, electromagnetic mapping and seismic refraction) on an excavated cell of the Ouled Fayet (Algiers, Algeria) pilot landfill indicated the presence of an underground runoff and permeable soil underneath the cell. These results contradict those obtained by a feasibility study, based, however, only on the analysis of seventy-six 10-m drilling cores. The 1D boreholes information has been proven to be insufficient and to give biased results. The presence of water at depth is evidenced by lower resistivity, high conductivity anomalies and increase of P-wave velocity. Thus, to the contrary of what is claimed in the feasibility study, a threat of leachate pollution is real. This study shows that landfill construction studies cannot give trustful results without geophysical investigations. More specifically, in Algeria, it is imperative to elaborate a landfill construction code, which should include mandatory geophysical prospecting and deeper drilling cores

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Section: Site Description and Local Geological Settingsmentioning

confidence: 95%

Evidence for an underground runoff and soil permeability at the Ouled Fayet (Algiers, Algeria) subsurface landfill pilot project from geophysical investigations

Djadia

Machane²,

Chatelain

et al. 2009

Environ Earth Sci

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“…The same study found that soil is unlikely to achieve adequately low permeability if the plasticity index is less than 10%. Similarly, the Atterberg limits (LL and the PI) are mostly affected by the ability of clay minerals to interact with water [18] and the hydraulic conductivity decreases with the increase of liquid limit and plasticity index [7]. With the percentage addition of Bentonite to the original soil, the liner requirement with respect to hydraulic conductivity can be achieved and makes the liner practically impervious [8,19,20].…”

Section: Use Of Bentonite In Clay Linersmentioning

confidence: 99%

“…Environmental regulatory authorities require hydraulic conductivity/permeability of clay liners to be less than a specified maximum value. For example, the maximum limit in the USA is 1×10 -9 m/s (3.28×10 -9 ft/s) and 1×10 -8 m/s (3.28×10 -8 ft/s) in Turkey [7]. Development of simple landfill facilities utilizing locally available materials to suit landfill liner requirements is the most economical and timely solution to this problem.…”

Section: Introductionmentioning

confidence: 99%

“…With the increase of Bentonite, hydraulic conductivity decreases and mainly associated with reduction of diffused double layer thickness surrounding the clay particles and decreases the hydraulic conductivity. Comparing the calculated values of hydraulic conductivity with recommended limits, the specimens are most suited as clay lining material with 8% addition of Bentonite [7].…”

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confidence: 99%

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Evaluation of Bentonite Mixed Indigenous Clays for Development of Clay Liners

et al. 2020

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This study presents experimental investigation of indigenous clays mixed with Bentonite to assess their suitability in potential use as clay liners. Soil samples with 0, 4, 8, and 12% Bentonite content from three different sites in Peshawar region were tested for various geotechnical properties. Grain size distribution, specific gravity, Atterberg limits and free swell were found through laboratory tests using appropriate ASTM procedures. Maximum dry density and optimum moisture content were calculated using Atterberg limits in available relationships. Finally, one dimensional consolidation tests were conducted to find relevant parameters for calculating hydraulic conductivity. A decrease in specific gravity, increase in free swell, and in optimum moisture content, decline in maximum dry density and hydraulic conductivity was observed with increase in Bentonite content across all three soil samples. During free swell, the soil clusters become larger leading to formation of floccules resulting in the narrowing of inter-particle space and thus blocking of permeable paths. It is concluded that 8% Bentonite content by weight yields a suitable mixture for a clay liner that has hydraulic conductivity in the range of recommended limits.

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“…The consistency limits have been representative indicators of clay behavior. Basically, the liquid limit, plastic limit and the plasticity index parameters are highly influenced by interaction with liquids [6], and the hydraulic conductivity tends to decrease when the liquid limit and the plasticity index are increased [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Kaolinitin kıvam limitleri üzerine inorganik tuz çözeltilerinin etkileri

Varank¹,

Demi̇r²,

Güvenç³

et al. 2018

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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This study presents the effect of different inorganic salt solutions (KCl, BaCl 2 , MgCl 2 , KNO 3 , Na 2 SO 4 and MgSO 4) at different concentrations on geotechnical properties (Atterberg Limits) of kaolinite material which can be used as impermeable bottom liner in barrier systems. Since the use of distilled water or tap water is far from being representative of the in-situ conditions in landfills, salt solutions were used to investigate the leachate effect on liner materials. Additionally, the mineralogical characterization of kaolinite was studied. Atterberg limits, specifically the liquid limit (LL) and plastic limit (PL) that were used for classifying the clayey soil samples according to the Unified Soil Classification System were determined whereas mineralogical studies performed included XRD, BET and FT-IR analyses. Results indicated that all salt solutions have a considerable effect on the consistency limits of kaolinite. The liquid limit values of kaolinite decreased with increasing chemical concentration whereas plastic limit values increased. It is observed that the effects of the divalent and trivalent cations on kaolinite were more apparent than those of monovalent cations. As a result chemical solutions decrease liquid limit values of high plasticity kaolinite materials, tend to reduce the thickness of the DDL and flocculate the kaolinite particles, resulting in reduction of swelling and increasing of hydraulic conductivity.

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Environmental geological and geotechnical investigations related to the potential use of Ankara clay as a compacted landfill liner material, Turkey

Cited by 26 publications

References 10 publications

Evidence for an underground runoff and soil permeability at the Ouled Fayet (Algiers, Algeria) subsurface landfill pilot project from geophysical investigations

Evidence for an underground runoff and soil permeability at the Ouled Fayet (Algiers, Algeria) subsurface landfill pilot project from geophysical investigations

Evaluation of Bentonite Mixed Indigenous Clays for Development of Clay Liners

Kaolinitin kıvam limitleri üzerine inorganik tuz çözeltilerinin etkileri

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