Shungite Waste of Mining Production in Modified Concretes Regional Case StudyAuthor(s): Yestemessova AS, Yesselbayeva AG and Yestemessova SM
The increasing regulatory requirements for concretes and modifying additives, as well as the need for environment protection and the recycling of industrial waste stimulate the creation of energy-efficient and environmentally friendly materials. One of the latest scientific achievements is the making of modified concretes with special properties. The concrete production technology significantly improved by using the chemical additives, special modifiers, as well as active and inert fillers. Kazakhstan has the richest mining resource base. Still, most of modifiers imported at high prices and with limited choice. The market of domestic modifiers based on local raw materials is underdeveloped. Shungite waste formed during extraction and technological processing used as a modifying mineral additive to concrete. Shungite can provide qualitatively new properties to concrete and reinforced concrete products and structures. The authors analyze its influence on the main parameters of concrete and characterize the processes in the solidifying silicate system with cement-dispersed schungite particles. These particles increase the strength of concrete and reduce the duration of its heat and moisture treatment.