UkrainianProfessional Education

Abstract

The work deals with the current problem of the industrial complex and the construction industry of Ukraine, namely ensuring the rational use of materials and energy resources. Up to 50% of the material resources consumed by the construction industry are produced by industrial non-metallic materials (crushed stone and sand). The technology of processing natural stone into final products is accompanied by the output of 25-30% of stone screening waste from stone crushing. A large number of screenings are sent to landfills. Quite powerful tailings dumps are accumulated in the quarries of the Rivne region. An obstacle to the widespread use of grinding sieves is primarily the large number of particles smaller than 0.16 mm, which in igneous rocks can reach 25%, including clay particles, which are determined by the desilting method - up to 12%, which entails an increase in water consumption from 9 to 18% and overspending of cement up to 20%, as well as irregular grain shape and rough surface. Along with this, the construction industry feels an acute need for conditioned aggregates. In particular, in the Rivne region, sand for concrete and mortar is mostly fine, which causes a significant overspending of cement in the production of concrete. The article proposes an effective way to solve this problem, namely ensuring the waste-free use of stone screenings in the production of heavy concrete. Technologies for enriching screenings and producing artificial sand on their basis are also being introduced. It has been studied that the increased content of particles smaller than 0.16 mm can create a positive effect in some cases 

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