Gaida O. Strength, deformation and fracture toughness of reinforced concrete beams, restored by injection.

The thesis is devoted to the solution of urgent scientific and practical tasks to develop the theoretical foundations of mathematical modeling and experimental studies of strength, deformation and fracture of concrete and reinforced concrete beams recovered by means of injection method. A survey of scientific literature on the topic of the thesis, resulting in a set need for research to determine the strength, deformation and fracture of reinforced concrete beams recovered injection method. Theoretical study of physical and mechanical properties of concrete impregnated with polymers. The proposed empirical formulas expressing the relationship between compressive strength concrete-polymer (cubes or prism) and other characteristics: strength in the central tension, tension bending, stretching and splitting in cross-section. Find inhomogeneous stress state of the body through interrelated characteristics of creep and relaxation component. Experimental study of strength and deformability of pre-damaged and restored reinforced concrete beams. Key words: reinforced concrete beams, strength, deformation, fracture toughness, stress-strain condition, treatment, injectable materials, concrete-polymer.