Abstract
The emission of toxic gaseous combustion products from timber constructions influences on the time required for evacuation of people from a building during a fire. In order to prolong the time interval until inflammation of timber constructions, fire retardant solutions are used. It is relevant and very important to determine how the emission of toxic gaseous combustion products from pine timber non-treated and treated with fire retardant solutions used in Lithuania differs during thermal destruction. Measuring carbon monoxide (CO) emissions, the paper focuses on toxicity analysis determined by nonstandard and standard research methods of smouldering and flaming pine timber, both non-treated and treated with fire retardant solutions. The description comprises specimens used in research and their preparation, nonstandard and standard research equipment and methods determining toxicity of smouldering and flaming pine timber, both non-treated and treated with fire retardant solutions. The article presents the analysis of experimental results processed by statistical methods.
Highlights
Timber is one of the main building materials, long-time used in construction as well as most widely applied
Affecting pine timber specimens treated with the fire retardant solution B by the heat flux of 8 kW/m2 in 365 s on the average, after the surface of the specimen reached the mean temperature of 156 oC, the sensor started registering carbon monoxide (CO) (Fig. 5)
Affecting pine timber specimens treated with the fire retardant solution B by the heat flux of 10 kW/m2 in 300 s on the average, after the surface of the specimen reached the mean temperature of 178 oC, the sensor started registering CO (Fig. 6)
Summary
Timber is one of the main building materials, long-time used in construction as well as most widely applied. Due to the protective features of fire retardants to impede gas emission during thermal destruction, the emission of CO from pine timber specimens treated with the fire retardant solutions A and B started after a longer period of time and at a higher surface temperature as compared to the emission of CO from the non-treated pine timber specimens.
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