Forced electric heating use for guaranteed quality of concrete clutching, restoring reinforced concrete structures

• Published in: Journal of physics. Conference series 2021-12, Vol.2131 (5), p.52066
• Main Authors: Molodin, V, Leonovich, S, Shpanko, S
• Format: Article
• Language: English
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2131/5/052066

Concrete adhesion is a decisive factor in restoring performance of reinforced concrete structures. Peeling of the repair concrete is observed, during the structures restoring that have been in operation for a long time in aggressive conditions. The studies of the carbon dioxide effect on cement stone showed crystalline framework destruction of the material and a decrease in its cohesive strength. This has a significant effect on grip. The use of forced heating of the repair mixture when it is placed in contact with the restored structure leads to the temperature gradients that enhance thermal diffusion and thus the impregnation of the damaged cement stone with the liquid phase from the repair concrete mixture. Crystallizing, the cement dissolution products form a new crystalline structure in the damaged cement stone, which enhances its cohesive strength and binds the repair concrete to the intact concrete structure of the restored structure, ensuring adhesion quality.