The main elements of the system of external reinforcement of bent reinforced concrete structures are fabrics and lamellas. Fabrics and lamellas are glued to the surface of building structures in a polymer matrix. The matrix provides adhesion of the reinforcing filler with the reinforced structure. The price of reinforcement with carbon lamellas is several times higher than for reinforcement with carbon fabric. The article shows a comparison of proposals on the market of building materials for the reinforcement of reinforced concrete structures with lamellas based on carbon fibers. On the example of a reinforced concrete beam of four types of cross-section, a comparative analysis of the selected reinforcement systems under different temperature conditions was carried out, a conditional utility coefficient was identified, showing the ratio of price to the percentage reinforcement of the structure. The results obtained can be used to select the most cost-effective composite reinforcement system.

Keywords: reinforced concrete beams; strengthening; composite material; carbon lamellas; external reinforcement; operating temperature