Establishment of the mechanism and fireproof efficiency of wood treated with an impregnating solution and coatings

Effect of a flame­retardant coating on the burning parameters of wood samples

“…-not only formation of a flame-retardant coke layer is the main regulator of the process but also decomposition of flame retardants with release of non-combustible gases, in particular, nitrogen and carbon dioxide which effect flame and inhibit the oxidation process in the gas and condensed phases as noted in [1];…”

“…A unit for determining material combustibility group was used [1] in the study. It was additionally equipped with a device for recording the specimen weight change during tests.…”

“…It is known that wood is not capable of flame combustion per se and the products of its decomposition burn only under thermal action. Wood impregnation with fire-retardants reduces formation of combustible volatile products, inhibits gas-phase flame reactions, eliminates surface combustion of carbonaceous residue and reduces rate of weight loss [1,2]. Application of coatings makes it possible to slow down material heating due to formation of a protective layer and maintain the material functions in fire for a definite period of time [3,4].…”

Influence of dry mixtures in a coating on the effectiveness of wood protection from the action of a magnesium flame

“…They withstand high temperatures and direct action of fire and make possible to maintain their functions for a set period of time [5].…”

“…The description of the behavior of swelling coatings at the time of the formation of a porous structure is a separate and complex task, it covers both stages of the process of heat protection: the inflation of a coating, and the subsequent heat transfer, which is formed during swelling [5,6]. Therefore, it is necessary to study conditions of the formation of a barrier for heat conductivity and to detect a mechanism of action of a coating with the formation of a layer of coke.…”