Address:

Sofia 1797, 10 Kliment Ohridski Blvd., University of Forestry, Department of Mechanical Technology of Wood

Head of the laboratory:

Assoc. Prof. PhD Nikolay Burdarov

The Wood Science Laboratory consists of two halls, which carry out a variety of wood training and research activities. The main hall (305) houses the xylotech. It contains specimens for studying the morphological structure of wood. They are two species, representing more than 50 of ours and about 30 tropical tree species. The hall has a rich collection of wood samples soaked in glycerin and prepared for microscopic examination. For these tests, the room is equipped with transmitted light microscopes. There are also various test pieces in the hall to study the physical and mechanical properties of wood.

The Hall of wood defects (306) is equipped with a rich collection for the study and study of the defects of wood. Samples collected over time by students and colleagues are presented here. They allow for a wide variety of deficiencies in both round and shaped materials.

Services provided by the laboratory:

3.1. Training of students

3.2. Research

3.3. Consultations

3.4. Services:

• Determination of water content in physical and mechanical tests. (according to BDS 17204: 1990 and BDS ISO 3130: 1999).
• Determination of linear and bulk drying. (according to BDS 17204: 1990 and standard of Council of Mutual Economic Assistance - CMEA 6089: 1987).
• Determination of linear and volume swelling. (according to BDS 17204: 1990 and standard of CMEA 6010: 1987).
• Determination of density in physical and mechanical tests. (according to BDS 17204: 1990 and BDS ISO 3131: 1999).
• Determination of the static hardness of the wood. (according to standard of CMEA 2366: 1980).
• Determination of the ultimate tensile strength of the wood along the fibers. (according to standard of CMEA: 1977).
• Determination of ultimate strength in static bending of wood. (according to standard of CMEA: 1976).
• Determination of the tensile strength of the fibers of the wood. (according to standard of CMEA 816: 1977).
• Determination of the ultimate tensile strength transversely of the wood fibers. (according to standard of CMEA 816: 1977).
• Determination of the shear strength of shear along the fibers of the wood. (according to the standard of CMEA 814: 1977)
• Determination of the cut-off strength of the transverse fibers of the wood. (according to standard of CMEA 814: 1977).3
• Determination of the splitting resistance of the wood. (according to the standard of CMEA 2365: 1980)
• Determination of the resistance to removal of nails and screws. (according to the standard of CMEA 2364: 1980).
• Determination of the linear deformation modulus for static bending of wood. (according to standard of CMEA 1142: 1978).
• Determination of the dynamic modulus of linear deformation of wood. (according to standard of CMEA 1143: 1978).
• Determination of deficiencies in round and scraped materials according to the standard of CMEA 2017: 1979; 2018: 1979; 2019: 1979; 320: 1976; 321: 1976; 391: 1976.
• Determination of tree species by their macroscopic features (according to BDS 12329: 1984).
• Determination of tree species by their microscopic features (according to BDS 12329: 1984).

Funds available to the laboratory:

microscopes, apparatus for preparation of microscopic preparations, apparatus for determining physical properties, stand for testing the mechanical properties of wood, apparatus for determining the dynamic modulus of linear deformation

Keywords:

wood structure, wood properties, wood defects, wood species, water content, linear and volume drying and swelling, wood density, wood hardness, compressive strength, static bending strength (MOR), tensile strength, tensile strength , splitting resistance, static linear deformation module (MOE), dynamic linear deformation module (Modul of Young).

Contact person:

Nikolai Bardarov, tel:(++359 2) 91 907, 463, :(++359 2) 91 907, 433, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Practical classes in Wood Science