Using different bio-fiber/mortar weight ratios and different applied pressures in the pressing process, a multilayer building panel with properties (apparent density, thermal conductivity, compressive strength) is obtained, which changes in a leak from one layer to another. Such a building panel has covering, decorative, heat-insulating and thermoregulatory functions, it can be installed vertically. Due to the multi-layered panel structure, the product has both load-bearing design functions (they are provided by an enclosing / outer layer with an apparent density of 400 to 450 kg · m-3 and a thermal conductivity of 0.09 to 0.10 W · m-1 · K-1) , and heat-insulating functions (they provide the inner layers of the panel with an apparent density of 200 to 250 kg · m-3 and a thermal conductivity of 0.058 to 0.065 W · m-1 · K-1). The fire resistance of the panel is provided by magnesium oxychloride cement, which can be increased by a refractory coating layer containing a hollow ceramic microsphere, which is described in one of the embodiments.
A multilayer panel is made by filling the mixture of binder and filler into a layer by layer and pressing. A multi-layer panel consists of at least three layers.
The invention relates to the field of production of building materials, it can be used for the production of various products with high thermal insulation properties. We offer an environmentally friendly, porous material made of bio-fiber-containing agricultural by-products (hemp or flax stalks, rapeseed, bamboo, reed, etc.) and magnetic binders with high-quality thermal insulation properties, moisture buffering properties and high fire resistance. The material is proposed to be made of layers of different densities, optimizing the density of the layers with the amount of binder added and pressing pressure, obtaining ready-made wall panels with a correspondingly dense, mechanically and fire-resistant outer layer, but less dense and heat-insulating inner layer. The invention is characterized by the filler used - bio-fibers, which allows the magnesium oxychloride material to provide not only high fire resistance, but also high thermal insulation properties. As well as the filling used in the method in molds, such as wood frame panels, it is distinguished from the traditional magnesium cement methods, which allow to vary the density of the material in the wall thickness.
Different binders can be used to bond bio-fibers (lime, cement and others) to each other. Unlike lime-based binders, magnesium oxychloride cement (MOC) binders are more compatible with lightweight aggregates of biological origin, as their curing is much less affected by organic curing retardants released from biological aggregates in the basic medium. Using different bio-fiber/mortar weight ratios and different applied pressures in the pressing process, a multilayer building panel with properties (apparent density, thermal conductivity, compressive strength) is obtained, which changes in a leak from one layer to another. Such a building panel has covering, decorative, heat-insulating and thermoregulatory functions, it can be installed vertically. Due to the multi-layered panel structure, the product has both load-bearing design functions (they are provided by an enclosing/outer layer with an apparent density of 400 to 450 kg · m-3 and a thermal conductivity of 0.09 to 0.10 W · m-1 · K-1) , and heat-insulating functions (provided by the inner layers of the panel with an apparent density of 200 to 250 kg · m-3 and a thermal conductivity of 0.058 to 0.065 W · m-1 · K-1) (Fig. 2). The fire resistance of the panel is provided by magnesium oxychloride cement, which can be increased by a refractory coating layer containing a hollow ceramic microsphere, which is described in one of the examples.
insulation materials,wall panel,porous bio-fiber material