Open AccessMODIFICATION OF LOW-VALUE WOOD SPECIES IN ORDER TO IMPROVE THE PERFORMANCE INDICATOR PRODUCTS
Author(s) -
И. Н. Медведев,
Dmitriy Parinov,
Владимир Шамаев
Publication year - 2020
Publication title -
aktualʹnye napravleniâ naučnyh issledovanij xxi veka: teoriâ i praktika
Language(s) - English
Resource type - Journals
ISSN - 2308-8877
DOI - 10.34220/2308-8877-2020-8-1-233-237
Subject(s) - pressing , pulp and paper industry , service life , environmental science , materials science , solid wood , logging , process engineering , composite material , engineering , forestry , layer (electronics) , geography
wood modification is a process of improving the physical and mechanical properties of low-value of the tree species, such as birch, aspen, poplar, etc. currently, this direction is very promising in wood processing. The main technological methods for modifying of low-value of the tree species include impregnation, pressing and drying, including an additional operation-heat treatment. In addition, the wood can be treated with magnetic or ultrasonic fields.
By means of impregnation, substances are introduced into the wood that increase its plasticity, hydrophobicity, bio-fire resistance and formostability.
As a result of pressing, the volume of wood is reduced and its density and strength are increased, hence the performance characteristics are increased.
Heat treatment of wood contributes to a significant increase in its hydrophobicity, bio-resistance and form stability.
A pilot industrial drying and pressing unit СПК-5M has been developed that allows to implement three technological methods (drying, impregnation, pressing) in one cycle. The product obtained at the installation is sleepers and power line supports that have high performance indicators compared to those traditionally used. The developed technology solves two problems:
1) the problem is solved with the use of low-value tree species (birch, aspen, poplar) rotting in cutting areas and lower warehouses in logging enterprises;
2) the problem of short service life of wooden sleepers and power transmission poles.
The projected service life of the resulting products will be 30-50 years.