Open AccessTHE LAYER-BY-LAYER VARIATION OF WOOD DENSITY UNDER UNIAXIAL COMPRESSION
Author(s) -
Aleksey Platonov,
Александра Киселева,
Светлана Снегирева
Publication year - 2020
Publication title -
aktualʹnye napravleniâ naučnyh issledovanij xxi veka: teoriâ i praktika
Language(s) - English
Resource type - Journals
ISSN - 2308-8877
DOI - 10.34220/2308-8877-2020-8-1-218-222
Subject(s) - composite material , materials science , pressing , economic shortage , humidity , surface layer , softwood , water content , raw material , relative humidity , moisture , layer (electronics) , shrinkage , geotechnical engineering , engineering , chemistry , linguistics , philosophy , physics , organic chemistry , government (linguistics) , thermodynamics
Currently, stocks of hardwoods in the Russian Federation are severely depleted and there is a shortage of raw materials on the market. One solution to this problem is the possibility of replacing hardwoods with pressed wood obtained from softwoods. As a result of the performed study, the change in the layer-by-layer density in the thickness of blanks made of pressed wood was found. The variation of density in the thickness of the workpiece depends on the moisture content of the wood at the time of pressing. At a humidity of 15 %, the wood is more compacted in the Central part than on the surface of the workpiece. When the humidity corresponds to the saturation limit of the cell walls of 30 %, the wood on the contrary is less compacted in the Central part, as well as on the surface of the samples. It was found that with the same average density of blanks made of pressed wood, the difference between the densest and less dense parts of the workpiece averaged 7.6-10.1 %. Based on these data, it is possible to obtain pressed wood with a given density distribution over the thickness of the workpieces. The results of the experiments will be useful in obtaining pressed wood with specified quality indicators, as well as in the manufacture of various structural elements and components from pressed wood.