Improvement of fire retardant properties of wood materials

Abstract

Any kind of construction involves the use of wooden structures that require the achievement of an appropriate class of their fire hazard with the provision of the required fire protection indicators. Currently, fireproofing of wood materials is carried out mainly by impregnating wood with fireproofing compositions. And the search by scientists for relatively cheap and environmentally friendly fire retardant materials (flame retardants) for impregnating and treating wood is still relevant. This article discusses the role of fire retardant for wood material. The experimental study using 4% tetraethoxysilane is described. An optimal method of applying a composition for increasing fire resistance and a fire-retardant efficiency group of the test composition have been experimentally established. The positive effect of this composition on the fire-retardant properties of the wood chip board was also established. Time characteristics during soaking and drying of samples are recommended.

Reducing the Fire Hazard of Wooden Structures

“…Fire-retardant coatings protect wooden structures from fire, can release gases and water vapor during heating, which phlegmatize the flame and prevent combustion. Unlike impregnation, the use of fireretardant coatings allows to provide the I group of fire protection of large structures, the autoclave impregnation of which is impossible to obtain the same group of fire protection [2][3][4][5].…”

Increasing the Fire Resistance of Reinforced Concrete Structures

“…The deformation modulus decreases and the ultimate strain increases. This causes redistribution of stresses in element sections during heating and during repeated immersions after cooling, redistribution of forces along the element length, as well as between structural elements; decrease of stiffness of sections and elements during heating [5][6][7].…”

Modification of wood with copolymers based on glycidyl methacrylate and alkyl methacrylates for imparting superhydrophobic properties

“…This type of modification does not require any special equipment and involves impregnation with polymer solutions, application of film‐forming composite coatings on the surface, or direct polymerization in the cavities of vessels, tracheids, capillaries, ray cells, and their walls. Impregnation modification is one of the most common and widely used methods for increasing wood resistance to aggressive action 32,33 . It is known that high molecular weight modifiers on the basis of poly‐1H,1H,2H,2H‐perfluoroalkyltriethoxysilane and polymethylsilsesquioxane are used to impart long‐term water repellency, resistance to aggressive media and superhydrophobic properties with contact angles of 153° and 164°, respectively 34,35 .…”