Possible Application of Some Alternative Materials for Mineral Liners in Karst Regions

The primary demand which must satisfy the material for mineral liner is its coefficient of permeability which should be less than 10-7 cm/s. Aside from widely used clay, as alternative materials for mineral liner, two types of materials were investigated: flysch and waste stone dust. The materials were compacted in laboratory and their coefficients of permeability were tested in a triaxial and a hydraulic oedometer cell. Instead of standardly used method for measuring the coefficient of permeability: constant or variable - head, flow-pump test, which was found more suitable method for low permeable materials, was applied. Flysch is recognized as almost suitable material, but waste stone dust is a little bit too much permeable and may be used only for landfills with pretreated waste.