The renovation technology of structures that has lost reliability during long-term operation in an aggressive environment

Some issues concerning the repair and chemical protection methodology of ammonium nitrate granulation RC technological tower shaft №1 of M-9 workshop PJSC "Azot" in Cherkasy was described. Variants of primary and secondary structures corrosion protection are given. Concrete deterioration and defects of secondary protection of concrete are described. It was revealed that during the initial inspection of ammonium nitrate granulation RC technological tower structures, the tower №1 concrete condition in a number of sections has both surface and through destruction. According to the technical assessment results and calculation analysis, which revealed the practical absence of RC tower trunk bearing capacity reserves, the design of its strengthening was proposed. It was implemented by a system of vertical and horizontal RC stiffeners for the possibility of its overhaul. A technological repair works sequence roadmap was developed. Sika Group offers a system of internal and external concrete surfaces chemical protection of tower trunk. Repair and chemical protection against aggressive influences on an internal and external surface of a RC trunk wsa offered. The use of concrete inside and outside continuous chemical protection system of tower trunk has shown that Sika’s innovative products and innovative repair systems and technologies are making inroads in the practice of construction production in the absence of a regulatory framework.