ABSTRACT
ABSTRACT: Asphalt concrete and bitumen have been used successfully in hydraulic engineering and in bottom barrier systems for domestic waste landfills for a long time, in particular in Switzerland and Germany. Asphalt liners are robust, their material is ductile and can follow differential settlements without failure. Asphalt liners can be constructed under very cold and very dry conditions, where clay liners encounter difficulties. However, asphalt suffers ageing and is not resistant to some of the substances (organic solvents, oil, diesel fuel, benzene etc.) occurring in solid waste landfills. The paper describes the properties of asphalt liners, the requirements on the liners and materials, the production process and the placement technique. A few examples of landfills equipped with asphalt concrete liners in Germany and in Oman illustrate the technology.
