International Conference on Agriculture, Forest, Food Sciences and Technologies (ICAFOF 2017), Nevşehir, Turkey, 15 - 17 May 2017, pp.1-8
It is very important to determine the classification and quality of wood obtained from standing trees according to efficiently using of limited forest resorcues. Semi-destrucitve and non-destructive test methods having a big potential to determine wood quality supply compareble information. Recently, studies have been focus on this subject. Fractometer can be described semi-destrucitve or non-destructive test method. The fractometer is a device that breaks a radial increment core along the fiber for the measurement of crushing strength, which is a direct wood quality indicator for wood material. In this study the increment cores were taken from standing Beech (Fagus orientalis Lipsky) and Pine (Pinus nigra subsp. pallasiana) trees. The 30 increment cores for each species were extracted with increment borer and conditioned in a climatic chamber in 20 ºC temperature and 65% relative humudity to get 12% moisture content. These increment cores were used to measure radial bending strength and compressive strength parallel to grain with Fractometer. Each measurement were realized at green and air-dry conditions.
The obtained values for pine trees, volume-density was 0.530 g/cm3, radial bending strength was 5.53 MPa and compressive strength parallel to grain was 26.65 MPa in standing trees. The radial bending strength was 10.97 MPa and compressive strength parallel to grain was 54.43 MPa in air-dry clear specimens. For beech trees, The volume-density, radial bending strength, and compressive strength parallel to grain were 0.603 g/cm3, 17.15 MPa, and 35.8 MPa, respectively, in green samples. Radial bending strength and compressive strength parallel to grain 25.16 MPa 61.10 MPa in air-dry clear specimens.
The results showed that obtained values from Fractometer were in accordance with results of conventional methods.