The effect of thermal treatment of spruce wood on its fire performance characteristics
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2017, Vol 97, Issue
Abstract
The effect of thermal treatment of spruce wood on its fire performance characteristics.The focus of this article is the assessment of the effect of thermal treatment of spruce wood (Picea abies L.) on its reaction to fire. The monitored test specimens were thermally modified at three temperatures, 160°C, 180°C and 210°C. The test specimens were sorted according to density, quality and the annual ring direction. During the test, they were subjected to a direct flame for 10 minutes, after which the flame was removed and the testing continued for 5 minutes. The monitored characteristics were weight loss and burn rate. We compared the measured resultswith results obtained from a set of test specimens that were not thermally treated - solid wood. The measured results show that thermally treated spruce wood has a lower weight loss when burning than untreated spruce wood. The lowest weight loss of 3.976 %was observed in spruce wood thermally modified at a temperature of 160°C. The burn rate was the fastest in spruce that was thermally modified at 210°C, which started to burn vigorously at 30 s and again at 140s; the graph shows 2 significant peaks. The highest burn rate of spruce thermally modified at 180°C was observed between 140 and 160 seconds. Spruce thermally modified at 160°C showed a similar burn rate as untreated spruceat 20°C. After 10 minutes, when the testing continued without a direct flame, the burning continued to die down for another 30 seconds, and then the weight stabilized and only changed slightly within the range of 0.05g.
Authors and Affiliations
HANA ĈEKOVSKÁ, Milan Gaff, Anton Oswald
Keywords
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