About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Viktor F. Stroganov, doctor of chemical sciences, professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0001-9680-6698 Evgeny A. Vdovin, candidate of technical sciences, associate professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0002-0649-4342 Rashit K. Nizamov, doctor of technical sciences, professor, Kazan State University of Architecture and Engineering, Academician of the Academy of Sciences of the Republic of Tatarstan, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0002-3448-7369 Ivan A. Stroganov, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it |
| Title of the article | Modification of epoxy-amine compositions for the repair of critical reinforced concrete structures |
| Abstract. | Problem statement. In concrete and reinforced concrete structures, when eliminating defects and damages using polymer technologies, it is necessary to take into account the features of the physical-chemical processes occurring at the interface of the “substrate (concrete) – adhesive” phases. However, these features are not taken into account in the technologies for repairing defects and damage to building structures. The relevance of the study is due to the need to provide designers and technologists with the knowledge to select reliable polymer repair materials. The purpose of the work is to substantiate the choice of the type of modifiers for epoxy–amine compositions that can be cured without heat supply and to develop compositions for repairing concrete and reinforced concrete structures that eliminate negative processes and provide a high level of adhesion and strength characteristics exceeding the level of foreign repair compositions-analogues. The following tasks were solved: to consider the features of amine curing of the mixture of epoxy oligomers and oligoester cyclocarbonates; to determine the effect of oligoester cyclocarbonates in the structure of epoxydiane oligomers and the contribution of hydroxyurethane fragments to the processes of physical-chemical modification of polymers; to develop import-substituting modified epoxy-amine compositions for the repair of reinforced concrete pressure pipes and other defective building structures that increase the levels of required strength and durability of building structures. Results. It has been established that modification of epoxy-amine compositions as a result of the formation of hydroxyurethane structures prevents the formation of “weak” boundary layers of highly polar substrates and prevents the processes of selective sorption of adhesive components. The developed composite composition surpasses its foreign counterpart Araldit K-79 Kit (Ciba Geigy, Switzerland) in terms of the set of characteristics. Conclusions. The significance of the results obtained for the construction industry lies in expanding the possibilities of choosing and using repair epoxy adhesive compositions that increase the reliability and service life of concrete and reinforced concrete elements in critical structures (tunnel finishing blocks, pressure pipes, etc.). |
| Keywords. | polymer adhesive, modifier, substrate, concrete, defects in building structures. |
| For citations: | Stroganov V.F., Vdovin E.A., Nizamov R.K., Stroganov I.A. Modification of epoxy-amine compositions for the repair of critical reinforced concrete structures // Izvestiya KGASU. 2024. №4(70) P.42-53. |
