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Nano-composite material is a completely new class of material that combines wood pulp and some porous materials of artificial and natural origin. This is an artificially created material consisting of a polymer matrix of the porous natural or synthetic material. The number of micro or macro-pores in the composite can be different for different wood species variety of micro and macro capillaries varying in average from 25 to 35% of the wood volume. The change in wood properties occurs at the structuring of water-insoluble molecules smaller than 3 nm and that is a part of the filler. Industrial technology of deep processing of wood-based nanotechnology allows the manufacture of new products such as laminated wood structures with nano-device that have properties not existing in nature: 1. The wood becomes hydrophobic, it is characterised by almost complete lack of absorption by the body of the wood, which leads to almost full, the lack of swelling and the change of the geometrical sizes of the material; 2. The absence of cracking. As the penetrating substance is evenly distributed between micro and macro pores and uniformly fills all the frame structure, there are additional internal stresses, typical for products made of natural wood; 3. The use of such technology ensures high 10-25% of the density if you increase strength by 20%, which also increases the seismic resistance and mi CNTI products and structures.

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Ecological construction has a tendency to increase. One of its directions is the straw bale-house. The safety of such buildings is based on increasing the fire resistance of pressed straw panels. In order to increase the fire resistance of such panels, they are plastered with a clay-lime mixture, treated with flame retardants and antipyrenes. The protective equipment effect on the fire resistance is not fully understood. Therefore, the work considers evaluation issues of the fire resistance in pressed straw building envelopes, depending on the plaster layer thickness, the straw pressing density and the flame retardants treatment. The study found that with a panel thickness of 450 mm, the straw density in the range of 110-140 kg/m3, clay plaster thickness of 30 mm ensure integrity, insulating and load-carrying capacity. The temperature on the panel rear side did not exceed 67 °C. The pressed straw density has almost no effect on the panel fire resistance. Antipyrenes treatment improves flammability from 18% to 37-42% that makes it possible to classify the samples as hardly combustible materials.

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