20.500.12556/RUL-669 Zgradba, lastnosti in možnosti uporabe lesa octovca diplomski projekt Structure, properties and potential use of staghorn sumac wood B. Sc. thesis Raziskali smo izbrane lastnosti lesa octovca (Rhus typhina L.), ki bi utegnile predvideti njegovo uporabo. Proučevali smo makro- in mikroskopsko anatomsko zgradbo, izbrane fizikalne lastnosti (radialno porazdelitev gostote in vlažnosti, krčenja in nabrekanja, kazalnike dimenzijske stabilnosti) ter nekatere mehanske lastnosti (modul elastičnosti, tlačno, upogibno in strižno trdnost). Ugotovili smo, da les octovca spada med venčasto porozne lesne vrste. Povprečna gostota v absolutno suhem stanju lesa je 514 kg/m3. Vlažnost svežega lesa v povprečju znaša 58,2 %. Krčenje in nabrekanje je majhno, nizka je tudi točka nasičenja celičnih sten, ki znaša 19,3 %. Kazalniki dimenzijske stabilnosti so ugodni, razen sorpcijskega kvocienta, ki je normalen, in anizotropije, ki je neugodna. Iz primerjave fizikalnih in mehanskih lastnosti lesa z lipovino in domačo kostanjevino ocenjujemo, da je les octovca primeren za manjše, nekonstrukcijske izdelke, saj je njegova upogibna trdnost 47 do 68 MPa, modul elastičnosti pa v povprečju le 5,3 GPa. We investigated selected properties of staghorn sumac wood (Rhus typhina L.) which might provide its usage. We researched the anatomical structure and macroscopic features, some physical properties (radial distribution of moisture content and density, shrinkage and swelling, dimensional stability) as well as some mechanical properties (MOE, compressive, bending and shear strength). The survey shows that staghorn sumac wood belongs to the ring-porous deciduous trees. The density of the oven dry wood is 514 kg/m3. Moisture content of fresh wood is approximately 58.2 %. Shrinkage and swelling is small, also because of low MC at fibre saturation point, which is 19.3 %. Indicators of dimension stability are favourable, with the exceptions of sorption quotient being normal and anisotropy being unfavourable. Comparison with lime and chestnut wood shows that staghorn sumac wood is suitable for small, non-structural elements, because of its low bending strength (47-68 MPa) and low modulus of elasticity (5.3 GPa). octovec Rhus typhinus les vlažnost gostota sorpcija mehanske lastnosti Rhus typhina wood moisture content density sorption mechanical properties true false false [J. Burdych] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2014-07-11 12:26:36 2014-07-11 12:26:36 2022-07-11 10:39:40 0000-00-00 00:00:00 2012 0 Ljubljana 0 VII, 34 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*812:582.746.66 2044041 du1_burdych_jera.pdf du1_burdych_jera.pdf 1 4B817FBA65776DC71A77B0CB92D32E96 41c3fe1b575f6a8d8e02d659d6f77e54f5efb435221594473600304a6e53e20d 67a275f1-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/e13e3a38-9ead-42bf-8878-dd5f7078618f https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132466 Biotehniška fakulteta 0 0 0