English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The elements of the upper structure of the railway track are sleepers, which are mainly made of coniferous wood. The main disadvantage of these sleepers is short service life, quality of impregnation and depleted raw materials base. To increase the service life of wooden sleepers, increase their biostability and form stability, raw materials for the production of sleepers must be impregnated with a composition of antiseptic and stabilizer, i.e. thermomechanical modification of wood should be made. Proceeding from the voluminous stock of wood species, it is advisable to use birch and aspen wood for production of modified wood, as one of the most widespread diffuse-porous softwood deciduous trees in the territory of the Russian Federation. The quality of the modified wood largely depends on the amount of antiseptic introduced with the stabilizer and the degree of wood compaction. The implementation of the technology for the production of modified wood is possible on the basis of information on the nature of the change in quantity and parameters of the main conductive anatomical elements (vessels) of diffuse-porous softwood deciduous trees. Changes in anatomical structure of wood are the basis for fluctuations in the quality of wood density and strength. As a result of the performed study, a change in the number of vessels and diameter of their cavities in birch and aspen wood along the trunk height has been established. This enables to determine the consumption of impregnating substance and develop rational wood pressing regimes (degree of pressing), depending on the position of assortment in the tree trunk, in order to obtain a homogeneous material for the production of sleepers from modified wood.

THE INFLUENCE OF VESSELS VARIABILITY ON WOOD QUALITY OF BIRCH AND ASPEN IN THE TRUNK OF THE TREE