Fly Ash As a Barrier Material

Using fly ash as a material for the mineral sealing layer is justified by its chemical, physical and mechanical properties. Fly ash is characterized by its ability to absorb and reduce leaks. Power-industry wastes possess the ability to retain various contaminants and heavy metals. The aim of the paper is to determine the fly ash properties as a material built into the insulating layer of storage yards. Based on the test results it can be stated that fly ash hydraulic conductivity depends on the test method and the sample preparation technique. Moisture content at compaction affects fly ash hydraulic conductivity. Compacted fly ash shear strength and resistance to failure are significantly greater than those of corresponding mineral soils in terms of graining in similar consolidation test results. Compaction effort and fly ash moisture at compaction have considerable effect on values of mechanical parameters.