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Information × Registration Number 0226U000845, (0125U001554) , R & D reports Title Rehabilitation and protection of sewer networks and structures using combined composite systems with enhanced resistance to aggressive environments popup.stage_title Дослідження та розробка складів композитних матеріалів і модифікованих бетонів Head Kabus Oleksii V., Кандидат технічних наук Registration Date 16-01-2026 Organization O.M. Beketov national university of urban economy in Kharkiv popup.description1 Development of a rehabilitation technology for sewer networks and structures using hybrid composite structures, including the production and combination of composites and concretes with specified properties popup.description2 Comprehensive experimental studies were carried out to evaluate the corrosion behaviour of polymer composites of different chemical nature, manufactured using various polymer matrices, reinforcing materials, and forming technologies. Changes in strength, deformation, and physico-chemical characteristics were assessed under the action of model acidic media representative of sewer environments, as well as a model alkaline medium simulating the influence of the pore solution of cement paste. It was established that laminate composites based on commonly used general-purpose epoxy and polyester resins do not provide adequate corrosion resistance under acidic exposure or prolonged contact with alkaline environments. The degradation of such systems is primarily governed by the permeability of the polymer matrix and the disruption of interfacial adhesion at the “fiber–matrix” boundary. The obtained results substantiate the feasibility of a differentiated approach to the use of composite materials, combining laminate systems formed directly on the concrete substrate and self-supporting factory-made composite elements with controlled material structure. For laminate systems, the use of vinyl ester resins with reduced permeability is considered appropriate as a barrier matrix capable of ensuring chemical resistance and minimising the diffusion of aggressive components. For self-supporting factory-made elements, the use of hot-cured epoxy resins in combination with specialised curing systems, in particular anhydride systems with accelerators such as 2-methylimidazole, is seen as a promising direction. Concrete mixes were optimised to reduce permeability and improve crack resistance as a factor that limits the transit of the alkaline liquid phase to the composite interface, reduces interlayer stresses, and contributes to the long-term durability of hybrid concrete–composite systems. Product Description popup.authors Andrii V. Kondratiev Petro A. Reznik Kabus Oleksii V. Kalmykov Oleh O. Anna V. Skripinets Pavlo M. Firsov Vitaly V. Vinogradov Kostiantyn P. Barakhov Alevtyna I. Aleinikova Dmytro V. Yelisieiev popup.nrat_date 2026-01-16 Close