Wood density and strength properties of Douglas-fir, Weymouth pine and Austrian pine wood | Густина и механичка својства дрвета дуглазије, боровца и црног бора
2007
Шошкић, Б., Шумарски факултет, Београд (Serbia) | Стојичић, Д. | Петровић, Д.
Wood properties of Douglas-fir, Weymouth pine and Austrian pine were researched. The study material originated from the plantations Industrijske Plantaže, in the surroundings of Banja Luka (Bosnia and Herzegovina), from the sixties of the twentieth century, established for the production of pulp wood for chemical conversion. The researched properties included: annual ring width, wood density in dry state, compressive strength parallel to the grain, bending strength in radial and tangential directions and shock resistance. Moisture content during the research amounted to: Douglas-fir 11.1, Weymouth pine 10.8 and Austrian pine 11.9 %. Mean density of all studied strengths amounted to: Douglas-fir 583, Weymouth pine 347 and Austrian pine 527 kg/cubic meter. Compressive strength parallel to the grain amounted to: Douglas- fir 63.7, Weymouth pine 29.26 and Austrian pine 47.1 MP-a. Bending strength, in radial direction, was: Douglas-fir 114. 8, Weymouth pine 68. 1 and Austrian pine 100. 7, and in tangential direction: Douglas-fir 119.7, Weymouth pine 62.8 and Austrian pine 101.9 MP-a. The testing of the study results of mechanical properties showed significant differences between different wood species, in all cases except between Douglas-fir and Austrian pine wood in bending strength in radial and tangential directions. The effect of stand origin on wood properties was not confirmed at the level of this study.
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