Abstract
In the article it is defined the modern problems of municipal systems of waste water networks which are related with their long time of maintenance in terms of biologically and chemically aggressive environment. It is shown that nowadays the most effective methods of increasing reliability and ecological safety of concrete reinforced deep laid pipelines as well as methods of increasing their maintenance time are the technologies of trenchless modernization with use of polymeric compound materials. It is offered technology of applying polymeric compositions on the inner surface of pipeline of large diameter that allows to obtain glue and protective coatings during trenchless recovery and repair
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