8. Implementation of Injection Technologies in the Renewal and Restoration of Serviceability of Concrete and Reinforced Concrete Structures

This chapter presents results of wide practical implementation of injection materials and technologies for renewal of concrete and reinforced concrete structures in industrial and municipal building structures of Ukraine damaged by cracks and/or other defects. Case studies of combined injection and waterproofing works in overground, underground, and underwater structures of stationary atomic power plants, as well as river hydroelectric pumped storage power stations, are illustrated. Descriptions of blockage technologies of water leakage through cracks or seepage through defect zones using injection materials in dams, turbine rooms, or adjoining working rooms of hydraulic works are represented. The process specific features and practical results on renewal of inner surfaces in concrete and reinforced concrete sewage collectors and water main pipelines 1400...3000 mm in diameter in the city of Lviv are given. Case studies of injection strengthening and surface protective waterproofing of injured tunnels, bridges, and traffic interchanges for rail and motor transport, as well as foundations, walls, and vaults of houses, churches, and other historical relics in antique city districts, are presented. Renewal with modern cement materials and surface protective waterproofing of reinforced concrete berths and other structures in seaports that have undergone long-term exposure to sea slaps and active humid air corrosion is illustrated.