Thermal Characteristics of Fireproof Plaster Compositions in Exposure to Various Regimes of Fire

Abstract

The problems of the fire safety of oil and gas facilities are particularly relevant due to the increasing complexity of technological processes and production. Experimental studies of steel structures with three different types of plasters are presented to determine the time taken to reach the critical temperature and loss of bearing capacity (R) of the sample, as a result of reaching a rate of deformation growth of more than 10 mm/min and the appearance of the ultimate vertical deformation. The simulation of the heating of steel structures showed a good correlation with the results of the experiment. The consumption of the plaster composition for the steel column was predicted, which allowed a 38% reduction in the consumption of fireproofing. It was found that to obtain the required fire resistance limit, it is necessary to consider the fire regime and apply plaster compositions with a thickness of 30–35 mm, depending on their thermal characteristics. The dependence of thermal conductivity and temperature on density is obtained, showing that the use of plaster compositions with a density of 200 to 600 kg/m3 is optimal to ensure a higher fire resistance limit. It is shown that the values of thermal conductivity of plaster compositions at 1000 °C are higher by 8–10% if the structure is exposed to a hydrocarbon fire regime. It is shown that the values of the heat capacity of plaster compositions at 1000 °C are higher by 10–15% if the structure is exposed to a standard fire regime.

Application of hybrid cement in passive fire protection of steel structures

“…With sensitive mixing, and when the correct consistency of the mixture was found that avoided crushing the expanded perlite, a bulk density of 587 kg/m 3 was achieved in the wet state. This wet bulk density was similar to that of industrial fire plaster (Gravit et al ., 2022; Kiran et al ., 2022).…”

The Fire Resistance of Transformable Barriers: Influence of the Large-Scale Factor

“…SP ELCUT has been repeatedly used to solve thermophysical problems to verify by comparing the results obtained with experimental data. For example, Gravit and co. [37] conducted experimental studies and simulation in SP ELCUT of steel structures with three different types of plaster. Simulation of the heating of steel structures showed good correlation with the experimental results and allowed to predict the consumption of plastering compound for a sample steel column.…”

Thermal Characteristics of Epoxy Fire-Retardant Coatings under Different Fire Regimes

“…It is assumed that the foam coke is uniformly distributed over the column in time. This approach is not analogous to the behavior of plaster compositions when the simulation is divided into three parts: before, during and after the phase transition of water to vapor (evaporation), which takes place on the heating curve at about 100 • C, with the duration of this phase in time depending on the moisture content of the material [40]. Foam coke formation generally occurs from the 3rd minute of fire exposure and is completed in an average of 15-20 min.…”