Effect of synthetic fire retardant thermally modified tropical woods on their fire characteristics
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2017, Vol 99, Issue
Abstract
Effect of synthetic fire retardant thermally modified tropical woods on their fire characteristics. This article is aimed at the evaluation of the effect of the synthetic retarder Flamagard T by Stachema (Czech Republic) on thermally modified tropical teak (Tectona grandis L. f.), meranti (Shorea acuminata) and merbau (Intsia bijuga) wood. The monitored sets of test specimens were thermally modified at 160 °C, 180 °C and 210 °C, and the results were compared with specimens that were not subjected to thermal modification (20 °C). The surface of the test specimens was treated with a double coating of synthetic flame retardant Flamagard T with a prescribed total coating mass of 500g/m2 . During the combustion, we recorded the weight loss of the specimens every 15 seconds for 10 minutes. The monitored characteristic was the weight loss. We compared the measured results with those found in individual sets of tropical woods thermally modified at individual temperatures, and another comparison was performed on one wood species at different thermal modification temperatures. The measured results indicate that the synthetic flame retardant Flamagard T has the desired effect on tropical wood species. The thermal modification of these wood species increases their fire resistance, and together with the use of a flame retardant the wood is classified as a non-combustible material according to EN 13501-1:2010, which is important in assessing buildings in which this type of wood may occur. Thermally modified teak wood has the lowest weight loss during burning of 1.29% when thermally modified at 210 °C; meranti has the lowest weight loss during burning of 1.72% when modified at 180 °C, and merbau has a weight loss of 0.85% at a thermal modification temperature of 180 °C. During the burning, a foam layer formed and the wood only burned with a small flame. The soft foam layer remained on the surface of the wood even after the tests were completed. The surface was cracked.
Authors and Affiliations
HANA ČEKOVSKÁ, Milan Gaff, Anton Osvald
Keywords
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