Current practice is to use a low permeability soil and/or geosynthetics to perform as the hydraulic barrier in a final cover for a landfill. Materials that are being used in final closures have several potential problems. This paper describes an investigation into the use of a particular spray elastomer in landfill cover liner applications. Material testing was done prior to field application to assist in the design of the appropriate formulation for the elastomer. Materials testing was also completed on samples retrieved from the field site periodically. The testing assisted in determining the durability, properties and cµaracteristics of the elastomer. Preliminary results from the spray elastomer investigation suggest the material to be appropriate for landfill final cover applications. Future efforts need to address the mechanics of a spraying system that would be compatible with the immense nature of many landfill lining projects.
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