ОГЛЯД ЗАСОБІВ ДЛЯ ВІДНОВЛЕННЯ ІРЖАВОЇ АРМАТУРИ В ЗАЛІЗОБЕТОННИХ КОНСТРУКЦІЯХ

The article considers modern types of chemical agents for the restoration of rusty reinforcement in reinforced concrete structures. Their chemical composition, mechanism of action, and application features are analyzed, in particular regarding cleaning, passivation, and formation of a protective coating of reinforcement. The principles of operation of agents based on orthophosphates, tannins, alkaline hydroxide solutions, and zinc compounds that provide effective cathodic protection are considered. Particular attention is paid to technological aspects of surface preparation, including rust cleaning, degreasing, and dust removal. A comparative analysis of agents is carried out according to the criteria of chemical composition, reaction speed, ease of application, compatibility with concrete, and subsequent coating. The paper provides tables of properties of the most effective compositions and illustrates the main stages of application. The advantages and limitations of individual groups of agents in the context of long-term protection of reinforcement in operating conditions of varying degrees of aggressiveness are determined. The materials of the article can be used as a reference base for civil engineers, designers, and specialists in technical inspection and restoration of structures.