Belgorod State University, Belgorod, Russia:

Ermolovich E. A., Associate Professor, Candidate of Engineering Sciences, e-mail: Ermolovich@bsu.edu.ru

Schok I. A., Associate Professor, Candidate of Engineering Sciences

This article presents the environmentally reasonable cement-free and low cement compositions of cast and hardening stowing pastes composites, based on the following industrial wastes:

regrinded granulated blast furnace slag (grade III);

regrinded wastes of dolomite road metal production;

production wastes of limestone road metal after the ultrafine grinding;

concentration wastes of ferruginous quartzites, thickened with flocculant Magnofloc 155;

grinded aluminothermic slag;

limestone gypseous composition;

slag and crushed stone.

Because of the possible losses of concrete block strength, the inexpediency of deslugging of stowage material, was proved by the research results of physical and chemical properties of anthropogenic wastes, using the laser diffraction methods, indicator method for determining the adsorption centers of distribution, X-ray fluorescence spectrometry and scanning electron microscopy.

This paper presents the physical and mechanical properties of filling composites. There are presented the dependences, which allow to predict their strength, taking into account the dispersibility of the components. An ultimate strength limit with the samples pressing for 90 days is 6,35-13,4 MPa. The part of anthropogenic wastes recycling is 94-99,9%, based on the recalculation on a dry matter. Application of developed composites for the goaf stowing will significantly improve the environmental situation nearby mining and metallurgical enterprises.

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