The problem of using fabric products for building structures for the storage and transportation of explosives is to ensure their resistance to fire and durability during operation, but it is necessary to take into account the change in their fire-resistant properties. Reducing the flammability and developing non-flammable and non-flammable materials is one of the main areas of preventing fires and solving the problem of expanding the scope of application of these materials. Treatment with fire retardants has a significant effect on the spread of the flame, allows you to significantly reduce the smoke-generating capacity and heat generation. Therefore, the object of research was canvas fabric, which was fireproofed with an intumescent coating. Simulations were carried out and dependences were obtained, which allow to calculate the value of the heat flow at the boundary "pinocoke layer - fabric" depending on the effect of temperature. It has been proven that in the process of thermal impact on the fabric, the process of transfer of high temperature and its ignition takes place. On the basis of the obtained results of field tests to determine the process of transferring high temperature of the flame through the coating, it was established that when the flame acts on untreated model samples of tent elements made of canvas fabric, it ignites at 45 C and the flame spreads over the surface, which leads to complete combustion for 108 s. The pattern of burning for a model sample of tent elements, which is treated with a fire-resistant intumescent coating, showed the absence of flame propagation after the fire burned out, and the swelling of the protective coating was recorded, reaching 7...8 mm. The practical value lies in the fact that the obtained results of determining the properties of canvas fabric fire-resistant with an intumescent coating make it possible to establish the conditions of operation of products and building structures based on it.

The results of experimental studies on the effectiveness of fire protection of easily erected structures made of flammable textile products are presented. An analysis of the directions of use of easily erected structures made of flammable textile products indicates a steady trend towards an increase in their use during the temporary fulfillment of certain tasks of the Armed Forces of Ukraine and units of the. During the heating of such structures, ignition and rapid spread of fire are possible. The operating statistics for easily erected structures have found a low level of safety due to the use of natural fibers (e.g., linen, cotton and blends), which are highly sensitive to heat and fire. Reduction of combustibility and the development of non-combustible and non-combustible materials is one of the main directions for preventing fires and solving the problem of expanding the scope of these materials. Treatment with fire protection means significantly affects the spread of the flame, allows you to reduce the smoke-generating ability and heat release significantly. After the test, it can be seen that the sample of the textile material sustains spontaneous combustion for more than 5 s; sample damage is more than 150 mm. After the test, it is clear that the sample of textile material does not support self-combustion for no more than 5 s; sample damage is no more than 100 mm. The inhibition of the process of ignition and flame propagation for such a sample is associated with the decomposition of fire retardants under the influence of temperature with the absorption of heat and the release of incombustible gases (nitrogen, carbon dioxide), a change in the direction of decomposition towards the formation of incombustible gases and a hardly combustible coke residue. This leads to an increase in the thickness of the coke layer and inhibition of the heat transfer of the high-temperature flame to the material, which indicates the possibility of the transition of textile materials during processing with a fire retardant composition to materials that are non-combustible, which do not spread the flame by the surface.

Describing the behavior of fire retardants and coatings, including swelling, at the time of formation of the insulating structure is a separate and complex task. In general, it covers both stages of the heat protection process: as a rule, the decomposition of flame retardants under the action of temperature with heat absorption and the release of non-combustible gases, and then - swelling of the coating formed by fire protection. Therefore, it is necessary to study the conditions for the formation of a barrier to thermal conductivity and the establishment of a fire protection mechanism from layer to layer of coke. In this regard, a study of the process of fire protection during the operation of the fire protection coating. According to the data obtained, it is found that the formation of volatile products under the action of high temperature on the coating takes place with the formation of non-combustible substances. It has been experimentally established that under the action of heat flow on fire-retardant samples there is an intensive release of inert gases and a reduction of combustibles in reverse order. This proves the effectiveness of fire protection. During the tests it was found that the intensity of the formation of the swollen layer of coke moves in the direction of elevated temperature. The results of determining the swelling capacity of the coating for the intumescent system showed that under the action of high-temperature flow the burnout of the material and the loss of coating weight are reduced more than twice due to the formation of high-temperature compounds. The coating under the action of high temperature forms a significant coefficient of swelling, promotes the formation of a heat-insulating layer of coke, preventing burnout of the fabric and the passage of high temperature to the material, which is confirmed by reduced heat of combustion. It was determined that the fire-retardant fabric has almost 1.3 times less heat of combustion and is characterized by thermal decomposition by reducing flammable gases by more than 50% and increasing inert gases by more than 8 times.