INDUSTRIAL TOWER LIFE CYCLE EXTENSION ACCORDING TO SIKA TECHNOLOGIES

Abstract

Some aspects of the life cycle extension of RC tower which is a chemical enterprise was described. This technological tower of ammonium seliters granulation has a height of +71,30 m. From this height to the Mark +46,10 mthe tower is made in a metal frame with diameter at the axes of the column22,56 m. The facade of this part is made of mounted keramzytoconcrete panels and in line constructional glazing. Between the marks 0,00 ÷ +46,10 mthe building has a monolithic RC trunk, which has a cylindrical outline in the form of a shell with an outer diameter of12,88 mand a thickness of0,3 mwalls. During 46 years of operation in chemical influences, the surface layers of the tower’s concrete trunk significantly lost its design strength. According to the results of almost regular surveys, the category of RC trunk technical condition was consistently classified as unsuitable for normal maintenance. A significant deterioration of the technical condition came in 2017, after which the building was withdrawn from the technological process, which gave impulse to the searching process of technical solution for the strengthening and chemical protection of the tower to prolong the life cycle of the entire facility. As a result of the survey the construction of the tower shall strengthening by a system of radial and vertical stiffening ribs was developed. It required a substantial unloading of the entire tower. Swiss concern Sika, one of the world leaders in the field of development and implementation of innovative technologies and materials for construction and industry, successfully implements its developments in Ukraine. For the above-described construction the firm Sika offered repair and chemical protection systems against aggressive influences for the internal and external surfaces of the tower shell, which will allow to significantly protect it and prolong the life cycle of structure.