The Use of Burnt Rocks of Mine Dumps and Ash-slag Waste in Road Construction

This chapter discusses the use of the burnt rocks of mine dumps and ash-slag waste for the building of subgrade road foundations, and as fillers of these products in the constructional layers of pavements on the base of practical experience accumulated in the Rostov region (Russia). For each constituent of road construction, certain materials are treated, which can allow attainment of the optimal properties and long-life service of road pavement. In particular, hardening kinetics of compositions containing technogenic raw materials are studied and also application of these materials in asphalt concrete and concrete coatings. The main characteristics, defining strength and durability of the constructions, are considered as follows: water saturation, water resistance, frost resistance, adhesion of bitumen to the mineral, abrasion, cement saving, etc. Moreover, replacement of ordinary concrete by the concrete products based on mineral fillers and binders is discussed. Compression strength, bending strength, and kinetics of the development of linear strains of concrete during cyclic tests in the conditions of aggressive medium are studied.