Protection of reinforced concrete structures in biologically aggressive environments

Introduction. The corrosion of concrete and reinforced concrete structures of buildings and facilities in biologically aggressive environments is considered and protective measures are indicated. All the presented materials are resulted from long-term surveys of numerous reinforced concrete structures of buildings and structures for various purposes along with full-scale corrosion tests of concrete samples in biologically aggressive corrosive environments. Aim. To summarize the results of the performed work on the corrosion and protection of reinforced concrete in biologically aggressive environments. Materials and methods. The reinforced concrete of structures and concrete samples prepared with means of protection against particular aggressive environments were studied, after they had been in biologically aggressive environments for a long period of time. The main research method is the study of concrete condition after prolonged exposure to aggressive environments. Results. From the results of the study are outlined the methods of concrete protection from the following exposures: plant roots on the floor slabs of reinforced concrete drinking water tanks; animal life products on the floors of livestock facilities; stone-borers on marine facilities; thionic bacteria on water disposal and treatment facilities; mold fungi on industrial and residential premises. Conclusion. Reinforced concrete structures in biologically aggressive environments should be protected through studying their peculiarities, corrosion mechanisms, as well as analyzing the condition of structures under prolonged exposure to biological environments.