ABSTRACT
With rapid growth in urbanization there is a rapid increase in the amount of refuses produced, this may consist of waste that poses risks to human health and the environment. Although some wastes are relatively harmless, others are dangerous now and for many years into the future and therefore require isolation within specifically engineered containment systems like a landfill. Modern landfills are highly engineered containment systems, designed to minimize the impact of solid waste on the environment and human health. In modern landfills, the waste is contained by a liner system. The primary purpose of the liner system is to isolate the landfill contents from the environment and, therefore, to protect the soil and groundwater from pollution originating in the landfill. The greatest threat to groundwater posed by modern landfills is leachate. Leachate consists of water and water-soluble heavy metals and other compounds in the refuse that accumulates as water moves through the landfill.
Landfill liners are made by compacting soil of desirable properties comprising adequate shear strength, lower hydraulic conductivity and lower volumetric strain on shrinkage.
Experiment studies were conducted on the prepared mix of locally available cochin marine soil and bentonite in four different proportion and the minimum dry density of each mix satisfying the required quality of liners were determined.
