• Journal of the Korea Organic Resources Recycling Association
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• v.15 no.3
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• pp.90-96
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• 2007

Modern waste management units, so-called "landfills" protect human health and environment from hazardous leachate and gas. Accordingly, it must be constructed with a bottom liner system that includes a gas collection layer. Leachate is the contaminated liquid that drains from the waste material pollutes ground water. For this reason. bottom liner system must have durability and low hydraulic conductivity (in case of compacted clay liner, no more than $1{\times}10^{-7}cm/sec$ ). P county in Kangwon province constructed a solid waste landfill with bottom liner system. In this study. it is mainly introduced that the test results on construction and quality control of bottom liner system by "Multiple composite liner construction technology", which is selected for bottom liner system in P solid waste landfill.

• Environmental Engineering Research
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• v.7 no.3
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• pp.121-127
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• 2002

• Proceedings of the Korean Geotechical Society Conference
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• 1999.03a
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• pp.521-528
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• 1999

As the size of our industry and population inclose, the byproducts such as municipal solid wastes, industrial wastes are in the increasing phase. The treatment of such things is rising as a social problem. Today, the final disposal of these wastes depends mostly on the landfill, and the sanitary landfill is required and designed for preventing soil and groundwater contamination. Clays have been used for a liner material of a sanitary landfill, however, the high quality clay is hard to come by and quite expensive as a lining material in our country. Using the waste lime produced abundantly every year from chemical processes was studied here, made from the proper mixing of the bentonite and the waste lime meets the regulations from the USEPA. The soil property index tests (sieve analysis, specific gravity test Atterberg limit test) were performed, and at last to confirm the sorption characteristics of the bentonite and the waste lime the sorption isotherm equilibrium test and the sorption isotherm were performed with Toluene and Ethylbenzene which are the main components of the leachate from the landfill.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1997.05a
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• pp.70-73
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• 1997

Recycling of$\boxUl$ useful industrial waste is highly recommended by the government. Some geotechnical properties such as specific gravity, dry density, unconfined compressive strength, pH. compressibility, permeability were determined to evaluate the feasibility of waste lime use in the landfill as an admixture clay liner. Various types of environmental tests on waste lime were conducted to compare the results with the EPA requirements. Laboratory test results indicate that admixture soil(waste lime/decomposed granite soil) is a promising material its an admixture clay liner in the sanitary landfill.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2002.09a
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• pp.390-393
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• 2002

Many researchers have studied for the barrier liner in the landfill that is mixed with clay mineral, native soils and solidified agent. However, they have a littel but problems for safety construction and maintenance as a bottom liner systems in the landfill. In this paper the authors studied the effects on hydraulic conductivity by electric-chemical ion-exchange agent that is a soil stabilization agent(Sulphonated Oil), The application of the soil stabilization agent to meet the hydraulic conductivity of clay liner in landfill is possible if the additive quantity and a proper reaction time is determined relevantly in the laboratory test.

• Proceedings of the Korean Geotechical Society Conference
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• 2004.03b
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• pp.453-460
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• 2004

To prevent penetration of rainwater into the landfill site is the main purpose of the final cover in landfill sites. Conventional designs of landfill covers uses geotextiles such as geomembrane and GCL, and clay liners to lower the permeability of final covers of landfill sites. However, differential settlement and the variation of temperature in landfill sites cause the development of cracks or structural damage inside the final cover and it is also difficult to obtain clay - the main material of the compacted clay liner in Korea. Thus the former final cover system that suggests geomembrane and GCL or compacted clay liner has several limitations. Therefore, an alternative method is necessary and one of them is the application of SRSL(self-Recovering Sustainable Liner) material. SRSL is two different layers consist of individual materials that react with each other and form precipitates, and with this process lowers the permeability of the landfill final cover. SRSL generally is made up of two layers, so that when a internal crack occurs the reactants of the two layers migrate towards the crack and heal it by forming another liner. In this study the applicability of SRSL material for landfill final cover was examined by performing; (1) jar test to verify the formation of precipitate in the mixture of each reactants, (2) falling head test considering the field stress in order to confirm the decrease of permeability or prove that the hydraulic condctivity is lower than the regulations, (3) compression tests to judge weather if the strength satisfies the restricts for landfills, (4) freeze/thaw test to check the applicability of SRSL for domestic climate. In addition, the application of waste materials in the environmental and economical aspect was inspected, and finally the possibility of secondary contamination due to the waste materials was examined by performing elution tests.

• Proceedings of the Korean Geotechical Society Conference
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• 2003.03a
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• pp.585-592
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• 2003

The purpose of this paper is to investigate purification characteristic of soil-bentonite landfill liner and to develop of desirable liner system. In this study, column tests for soil-bentonite, reactive soil-bentonite and existing bentomat and reactive bentomat were carried out under the high pressure with water and leachate.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1999.10a
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• pp.73-76
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• 1999

Soil-bentonite mixtures are frequently used as impervious for waste disposal sites. In the present work, bentonite composite liner systems(BCL) have been developed by utilizing Korean zeolitic bentonites. The geomechanical properties of the liner systems, such as strength, hydraulic conductivity, etc. have been studied. The laboratory and field test results are also be presented.

• Proceedings of the Korean Geotechical Society Conference
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• 2001.11a
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• pp.85-95
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• 2001

There has been a steady increase in closed waste landfill. Sanitary and contamination prevention systems such as liner system, leachate treatment, gas treatment system were not installed in unregulated waste landfill. This study was carried out to introduce the rehabilitation method and case of unregulated closed landfill.

• Proceedings of the Korean Geotechical Society Conference
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• 1997.03a
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• pp.153-160
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• 1997