ABSTRACT
This chapter presents a review of various types of impermeable liners, material, construction methods, performance, and methods of leachate collection and removal systems. Sanitary landfill liners must be constructed of materials that have appropriate chemical properties and strength, and a sufficient thickness to prevent failure from internal or external pressures. Liners can be classified in a variety of ways. Among these are: construction methods, physical properties, permeability, composition, and type of service. Due to their availability, clayey soils should be considered as the first alternative for a waste confinement liner. A number of admixed or formed-in-place liners have been used to impound water. Possible admixes include asphalt concrete, soil cement, and soil asphalt. The sprayed-on linings are classified into four types: air blown asphalt, emulsified asphalt, urethane modified asphalt, and rubber and plastics in either liquid or latex form. Rubber and resin latexes have also been used for making in situ liners.
