Abstract
This study has confirmed the possibilities of using logging waste for the production of wood-composite material. The raw material for its manufacturing is the wood weaving made by flattening branches. An experimental study into the physical, mechanical, and technological properties of the wood-composite material made from the poplar branches has made it possible to determine its rational structure and the type of a binder. It has been established that ensuring the flat shape of the material requires that it should be formed of three mutually perpendicular layers. It is advisable to use urea formaldehyde resin as a binder for plates that are not exposed to the impact and static loads and are used indoors. When the material is to be applied under conditions of elevated loads and in places with high humidity, phenol-formaldehyde resin should be used. The rational pressing mode parameters have been defined: temperature, t =180 °C; pressure, p =8 MPa; holding time, τ=7 min., at which one can achieve a minimum deformation of plates after pressing. It has been proven that under these schedule parameters the holding time for the new wood-composite material to achieve the shape stabilization is also minimal; it is seven days. It has been determined that the new wood-composite material possesses the physical and mechanical properties similar to those of the OSB panels
Highlights
One of the biggest environmental problems, which has been acute in any industry in recent years, is the formation of significant volumes of different types of wastes and, the necessity of their storage, processing, and utilize.At present, woodworking and logging enterprises face the issue related to the disposal of wood waste because timber harvesting leaves up to 25 % of the biomass in the felling area; its use is a pressing problem.Over years, there is an increasingly acute task to efficiently and completely utilize wood, including timber waste
In 2019 alone, the amount of waste from timber harvesting operations in Ukraine amounted to about 9 million m3; it was mostly piled in felling areas and subsequently burned
The peculiarity of the new wood-composite material is the application of a wood component made from whole woody fibers obtained by flattening the poplar branches
Summary
One of the biggest environmental problems, which has been acute in any industry in recent years, is the formation of significant volumes of different types of wastes and, the necessity of their storage, processing, and utilize. The manufacturing technology of fiberboards of different densities, particle boards, oriented strand boards involves the crushed fibers of wood waste [1] This predetermines their use in the furniture industry and in the carpentry and construction sector. Production of the latter in Ukraine is insignificant because of the difficulties related to equipment and the inability to directly utilize all the waste from timber-woodworking enterprises, which requires the search for alternative solutions. Another way to use wood waste is the production of fuel briquettes and granules. Determining the technological features in the manufacture of a wood-composite material from logging waste is of the scientific and practical significance but could ensure the rational utilization of wood resources to produce products with a high added value
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