Influence of surface coatings on wood material reaction to fire
2008
Buksans, E., Institute of Forest and Wood Products Research and Development, Jelgava (Latvia) | Morozovs, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Food Technology. Dept. of Chemistry
Wood is widely used in buildings as construction elements for roofs, floorings, windows and doors. Different wood surface coatings and treatment methods are used to improve wood's durability. Such coating would change the wood's material reaction to fire performance. Screening of influence of different wood coating materials on the wood product reaction to fire is objective of present paper. Thirteen different coating materials used for preparation of the specimens were selected to cover the most common wood coating materials in the market of Latvia. Four of them were fire retardant coatings. Specimens were tested and evaluated in accordance with standard EN ISO 11925-2 with additional evaluation indexes such as ignition time, flame damage area, and the sustained burning time were used. Water-born paint and lacquer as well as oil coatings blocked fire ignition and damage on plywood surface in comparison with untreated plywood. Combustible nitrocellulose coating on spruce wood test in single burning item (SBI) test approved its flammability but showed several times lesser total smoke production. Intumescent fire retardant coatings showed the best fire performance. No wood damage was observed under developed protective foam. Fire retardants based on salt solutions prevented ignition, but couldn't protect against thermal damage of plywood surface.
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