FIRE RESISTANCE OF MONOLITHIC REINFORCED CONCRETE ENCLOSING WALLS OF TANK FARMS
PURPOSE. The article is a generalization of the results of research work to determine fire resistance of monolithic reinforced concrete enclosing walls of tank farms made of different types of concrete under the influence of a real oil or oil product spill fire at the destruction of vertical steel cylindrical tank. METHODS. The basis for experimental studies of thermal parameters of concrete was the methods of synchronous thermal analysis and laser flash, and their strength characteristics - standard methods for determining the prismatic strength, modulus of elasticity. The basis for theoretical research was the method of heat transfer theory, probability theory and mathematical statistics, identifying patterns, description, generalization. The results of numerical simulation of the process of concrete samples heating in the hydrocarbon fire mode were confirmed by the results of fire tests using modern verified instruments and equipment. FINDINGS. The article presents a valid hydrocarbon fire mode-hydrocarbon curve oil spil. The results of theoretical and experimental studies on the presence of thermal and mechanical properties of heavy concrete, shotcrete and fibroconcrete concrete are given. Nomograms for determining temperature in the construction layer of enclosing walls of different thickness with one-sided impact of hydrocarbon fire mode of up to 600 minutes are presented. RESEARCH APPLICATION FIELD. The results of the research can be used in practice to assess the actual limit of fire resistance of the enclosing walls of tank farms for of oil and oil products storage. CONCLUSIONS. According to the results of theoretical and experimental studies the hydrocarbon regime of the fire was validated, the thermal performance and strength properties of concrete, sprayed concrete and the concrete fibroconcrete in the temperature range from 20 to 1 100 °C were obtained and nomograms to determine the temperature in the layer of the building structure with a thickness of 0,4 to 1,0 m with one-sided impact of hydrocarbon oil spil curve up to 600 minutes were developed. All that can be used in practice to assess the actual limit of fire resistance of the enclosing walls of tank farms for oil and oil product storage.