Аннотация
water into the pores of the limestone, but preserves its vapor permeability, which is important for wall and decoration materials.The evaluation of protective coatings was performed with laser particle size analyzer, scanning probe microscope and a diffractometer.It showed that the average size of the particles forming the protective coating is in the range of 20-25 nm, the particles shape is spherical, the particles are elemental sulfur with orthorhombic structure of the crystal lattice.The processing of shell limestone with calcium polysulphide solution provides formation of coating based on nanosized sulfur on the surface of stone pores.The coating partially fills the pore space and, as it is hydrophobic, reduces the water absorption of the samples by a factor of 5-8, increases their average density by 22-27%, strength in 1,2-1,3 times, the softening factor by 6-19%, that makes possible to predict the increase of the durability of building materials based on shell limestone to 1.5-2 times or more.Impregnation of the wall, facing and road construction materials and limestone products with polysulfide composition «Akvastat» allows improving their operational properties, increasing resistance to weathering, expanding their area of application in the climatic conditions of Central Russia.