Abstract
The goal of this study is to investigate the possibility of using the Irbid city clayey soil as compacted clay liner. The geotechnical properties and the permeability characteristics of compacted clayey soil sample obtained from the eastern part of Irbid city were determined to evaluate their suitability as compacted clay liner. Falling head permeability test, unconfined compressive strength and volumetric shrinkage test were conducted on soil samples that were compacted at about 0% and 3% wet of its optimum water content. The leakage rates expected through clay-only and composite geomembrane-clay liners were determined. It could be concluded based on the results of the geotechnical tests and leachate rate calculations that Irbid clay is appropriate to be used as compacted landfill liner material.
Highlights
Jordan is a country with limited natural resources and high population growth due to the three waves of immigration resulting from the Gulf wars, the occupation of Iraq, and the Palestinian conflict
Volumetric shrinkage tests [6] were conducted on specimens prepared at optimum and 3% wet of optimum water content showed that the soil samples had volumetric strain of 3.4% and 3.8% respectively. [7] suggested that hydraulic conductivity less than 1 × 10−7 cm/s is required for well designed clay liner. [8] suggested that the unconfined compressive strength of the compacted clay liner should be greater than 200 kPa. [8] suggest that an acceptable limiting value of volumetric strain to prevent desiccation for the soil should be less than or equal to 4%
The tests results on Irbid clay showed that all suggested requirements are met and that Irbid clay is suitable for utilization as compacted clay liner
Summary
Jordan is a country with limited natural resources and high population growth due to the three waves of immigration resulting from the Gulf wars, the occupation of Iraq, and the Palestinian conflict. This, together with many other economical, political, and social factors, has created many environmental threats to the environment of Jordan, especially in the area of water pollution and solid waste sector. The average solid waste generation in Jordan ranges from 0.72 to 0.92 kg/cap/day. The total estimated daily generation of municipal solid waste in Jordan is about 3700 tons/day. The solid waste generated at the northern region of Jordan is disposed of at Al Akaider landfill located about 25 Km to the east of the city of Irbid. The area of the landfill is classified as an arid region with an average rainfall is about 160 mm/year, with highest mean annual temperature of 27.4 ̊C and lowest mean annual temperature of 8.7 ̊C
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