ECONOMIC JUSTIFICATION OF MEASURES TO INCREASE THE DURABILITY OF CONCRETE STRUCTURES IN BIOLOGICALLY AGGRESSIVE ENVIRONMENTS

Аннотация

The article assesses the impact of concrete biodegradation on the durability of concrete and reinforced concrete bridge structures. Areas of biocorrosion and other types of concrete corrosion were identified on real bridges. Based on the developed physical and mathematical model, we calculated the service life of reinforced concrete bridge supports and proposed economically advantageous terms for removing biodeposits from concrete. We also calculated the economic efficiency of removing biofouling from concrete and determined that the annual economic effect amounted to 9 % of the cost of the estimated work. If preventative measures against biofouling are carried out at least once every five years, the period for carrying out works to eliminate defects in concrete and reinforced concrete building structures can be increased by 1.5x. We provide recommendations to improve the durability and effective operation of bridge structures.