The degree of physical depreciation of buildings and structures

The influence of an aggressive environment affects the appearance of physico-mechanical and physico-chemical corrosion processes, which in turn affects the depreciation of concrete properties, the redistribution of internal forces in sections and the depreciation of the working conditions of the reinforcement. The article discusses issues related to the degree of influence of environmental aggressiveness on building structures. It was shown that steel corrosion in concrete occurs due to a change in its passivity, which is associated with a decrease in alkalinity to pH <12 during carbonation of concrete. Data on the average rate of destruction of the material (metal and concrete) are given in case of corrosion. Types of solutions to extend the life of buildings and structures are presented. Methods for calculating physical wear are highlighted. The physical depreciation of the building is shown graphically, considering repair work. The definition of physical depreciation of buildings based on the calculation of the physical depreciations of its individual structural elements is given. An example of calculating the physical depreciation of a building is considered. A formula has been developed for determining the degree of damage to structural elements of a building object. The results of calculations of the degree of damage and the degree of physical depreciation of structural elements of the building are presented. © Published under licence by IOP Publishing Ltd.