Use of coal waste in road construction

Large- coal waste dumps are sources of environmental pollution. At the same time, these dumps are potential sources of materials for construction of embankments. Coal waste consists of fine-grain components created mainly by weathering and of large fragments varying in strength, water and frost resistance. Coarse soil stability characteristic is accepted as a holistic criterion for evaluating the possibility and the necessity of creating the dense structure of multicomponent coarse soil. At that, strength of aggregates system at compaction may serve the criterion for evaluating the possibility of creating the dense structure. Resistance to weather effects and climatic factors may serve the criterion of necessity. Studies of changes in mine rocks gradation under the influence of compaction, wetting-drying and freezing – thawing were conducted. Based on this, technological classification of coal waste as a multicomponent coarse soil was developed and special design and technological solutions