The invention relates to a method for producing water-repellent concrete, applicable in the field of construction, industry, and civil engineering, and in particular in technologies for producing water-repellent plaster based on various hydrophobic modifiers and superhydrophobic protective coatings. According to the proposed method for producing super-waterproof concrete, 10 g of Portland cement, 20 g of sand, and 5 g of water are mixed in a plastic container and poured into a cylindrical mold with a diameter of d = 3 cm2. After 105 min of initial hardening of the mixture at room temperature, the surface of the concrete is evenly moistened with 0.3 ml of a solution of construction silicone and turpentine, mixed in a ratio of 1:10, using a plastic pipette. Hydrophobic carbon soot, formed in a flame of burning rapeseed oil at a temperature of ~600°C, is deposited on the chemically treated surface, which contributes to the adhesion of the construction silicone and soot to the concrete. A solution of construction silicone and turpentine is used as a chemical bonding agent, which forms chemical bonds of the type Si-O-Si and SiO2 during the polymerization process. These types of bonds cause the deposition of a reticular silane layer, which bonds to the surface through hydrogen bonds with the hydroxyl functional OH groups of the concrete. At the same time, the oxygen groups of silicon interact with the hydroxyl and/or carboxyl chemical complexes of the soot, resulting in a mechanically stable covalent bond of the Si-O-C type. The effectiveness of the protective layer of construction silicone-soot has been tested by immersion in water and ferric chloride (FeCl3) for a period of 24 hours. A 60% lower water absorption rate was observed compared to hydrophilic concrete due to the weak physicochemical interaction between the soot and water, which leads to a convex shape of the liquid meniscus and blocks water from seeping into the pores of the coating. The thin air layer between the micro- and nanographite particles on the non-wettable concrete surface prevents the penetration of corrosive FeCl3 ions, the corrosion rate decreases more than eleven times compared to an uncoated sample, and at the same time, the cooling of the concrete structure is slowed down when the ambient temperature drops rapidly.
