Underwater Shock Wave Treatment of Wood for Improving the Fire Protecting Properties

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Wood is an economical and renewable building material. However, untreated wood is subject to attack by insects, fire and decay fungi. To ensure long- term structural performance, wood must be protected from its natural and artificial hazards. The paper presents the description, results and result analysis for the effects of underwater shock wave treatment of wood on fire-retardant impregnation with a salt-containing agent and on wood fire performance. Underwater shock is generated in a water tank by means of explosion of detonating fuse which contains explosive. Shock wave with high -strength is applied to the wood samples on the basis of distance between the samples and detonating fuse. Treated samples are subjected to injection for fire retardant chemical impregnation. Shock treated wood is showed relative higher permeability, and improved flame proof performance in combustion test.

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