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Conventional liners and covers for solid waste storage are typically constructed of multiple layers of compacted clay and flexible membranes to prevent undesirable leachate from entering the ground water system. An effective alternative is a system of asphalt concrete to provide a strong and durable impermeable liner system with one or more layers. Polymer modification of the asphalt binder provides the ability to increase binder content for impermeability without sacrificing flexibility and strength. The benefits of these materials were demonstrated in the construction of a liner for incinerator bottom ash near Bellingham, Washington.
asphalt, polymer modified, solid waste liner, impermeable, binder content
Principal, Terrel Research, Edmonds, Washington