Methods of increasing the resistance of concrete to catastrophic failure in a fire

Abstract

Abstract A characteristic feature of modern building industry is an increase in the construction of high-rise, technically complex and unique objects. A special role in ensuring the safety of objects of this kind is played by fire protection of load-bearing structures. The aim of this work was to review existing solutions aimed at increasing the fire resistance of reinforced concrete structures in order to ensure normative indicators. The research method is theoretical analysis. The issue of protecting reinforced concrete structures from brittle destruction of concrete in a fire is considered in detail. It has been established that a very effective way to maintain the integrity of a reinforced concrete structure during fire exposure is to modify the composition of concrete and control the structure in order to create a certain pore volume in concrete. The available data on the use of such methods are mainly empirical. The influence of qualitative and quantitative indicators of the additives used, the possibility of combining various methods to increase the fire resistance of concrete, modes of heating structures in a fire, and others are not sufficiently studied. These tasks seem relevant and require additional research.