Abstract
On the basis of a charge consisting of a local dump sandstone overburden of coal mining and soda ash, as well as a poroformer from local limestone, porous granules with a volumetric bulk mass of 284 kg/m3, compressive strength of 1.6-1.8 MPa, thermal conductivity of 0.09 W/m °C were obtained. At the same time, porous granules that meet the requirements of GOST 9757-90 “Gravel, crushed stone and sand. Artificial porous materials” are obtained from a charge containing 70 % of the main raw material, 25 % of soda and 5 % of carbonate component. The resulting material is considered as an effective local thermal insulation backfill and as a porous aggregate for the manufacture of lightweight concrete.
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