| Реферат: | eng: The article presents research data on the effectiveness of impregnation with polysulfide solutions of limestone shell rock used as a facing and wall material, as well as for the manufacture of road products. It is established that for calcium polysulfide, when they are diluted with water or mixed with acid solutions, primary sulfur nanoparticles with an average size of 20 nm are formed, which are subsequently enlarged in two stages to micron sizes. Modification of limestone-shell rock with the impregnating composition developed by us - an aqueous sulfur-containing solution based on calcium polysulfide, containing alcohols and surfactants - can significantly reduce their water absorption and increase their durability. Processing of shell limestone with a solution of calcium polysulfide provides education on the surface of the pores of the stone coating based on nano-sulfur, which partially fills the pore space and having water repellency, reduce water absorption of the samples 5-8 times, increases the average density of 22-27%, the strength of 1.2-1.3 times, softening coefficient - in 6-19%, which allows to predict the increase of durability of building materials on the basis of limestone up to 1.5-2 times or more. The impregnation of wall, facing and road construction materials and products made of limestone-shell with a polysulfide composition allows to improve their operational properties, increase their resistance to atmospheric influences, and expand their scope of application in climatic conditions.
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