FEATURES OF FIRE PROTECTION OF THERMALLY MODIFIED WOOD WITH INTUMESCENT COATING

Abstract

Recently, coatings that are capable of forming a heat-insulating layer on the surface of a building structure have become widespread, which significantly reduces the processes of heat transfer to the material. To determine the effectiveness of fire protection in the developed coatings, studies were conducted on the flammability of thermally modified wood in terms of mass loss and increase in flue gas temperature, and it was found that when the coatings were applied, the degree of damage to the samples by weight did not exceed 5.6 %, and the flue gas temperature did not exceed 76 °C. The results of determining the effectiveness of the coating for the system showed that under the influence of a high-temperature flame, the combustion of the material and the loss of mass of the coating decreases due to the formation of high-temperature compounds, while the time to reach the limiting temperature increases. In addition, under the influence of a high-temperature flame of a fire furnace, it was shown that the intumescent coating, which can withstand high temperatures, effectively prevents heat from penetrating the material due to the formation of a swollen layer of coke, which affects the rate and depth of temperature absorption.