Studying the effect of fire retardant coating on the fire hazard characteristics of wood using infrared thermography

Abstract

This paper represents a study concerning the effect of fire retardant treatment «FUKAM» on the fire hazard characteristics of pine, aspen and larch. The front of model ground fire was investigated to estimate its effect on the surface of wood samples. Infrared thermography was used as a diagnostic method. The surface temperature distribution was obtained for the test wood samples after exposure to a fire front that was modeled using pine needles. The probability of ignition was estimated for the chosen experimental parameters for each kind of wood. The fire hazard characteristics of wood after fire retardant treatment showed a significant reduction in the surface temperature and the resistance to fire for the chosen parameters of the experiment compared to the same untreated samples.complete pyrolysis occur at a rate that is low to create a combustible concentration. In addition, as is known, for stable combustion the solid material should obtain the amount of heat that provides a continuous supply of the sufficient amount of gaseous combustible substances in the combustion zone [17].The use of fire retardant treatment (for example a fire retardant «FUKAM») certainly increases the resistance of wood to fire, which is confirmed by the data on the sample surface temperature after exposure to model combustion.

Investigation of the ignition of wood structural materials (with and without fire retardant treatment) under the influence of a model fire of irregular intensity

“…The dimensions of the samples in the experiment were (Length × Width × Height): 0.300 × 0.016 × 0.300 m for plywood, 0.300 × 0.018 × 0.300 m for oriented strand board. The densities of materials depending on the thickness are 570-590 kg / m 3 for OSB samples with width range 0.018-0.025 m; = 650-690 kg / m 3 for plywood samples with width range 0.015-0.016 m. Figure 1 shows a schematic diagram of the experiment: The method presented in [14][15] was used to determine the temperature fields on the surface of the studied wood samples subjected to the model forest fire by applying a noncontact method. In addition, along with the «FUKAM» fire-bio retardant treatment for wood [16], the following solutions were considered: «Pirilax-Classic» fire retardant treatment with an antiseptic effect for wood [17], «SENEZH OGNEBIO PROF» fire retardant [18], as well as «MIG-09» fire-retardant composition [19].…”

“…In this paper, the effect of various flame retardants was evaluated to study the influence of the fire front on the surface of wood building material samples [13][14]. The IR thermography was used as a diagnostic method [15].…”

Ignitibility of structural wood products exposed to embers during wildland fires :

“…Kasymov et al [26,107,124] studied the ignition of solid wood samples by embers generated under laboratory conditions. To simulate the real wildfire scenario, the wood substrate was preheated up to a temperature of 220 o C, and wind flows of 1 m/s to 1.5 m/s were applied.…”