20.500.12556/RUL-287 Lepljen les za konstrukcijske namene diplomsko delo Glued wood for construction purposes visokošolski strokovni študij Raziskovali smo mehanske lastnosti različnih lesnih vrst in iz njih izdelanih kompozitov, ter možnost njihove uporabe v konstrukcijske namene. Uporabili smo 2 vrsti lepila in lesne vrste: bukev, smreko, macesen, lipo, brezo in jelšo. Lesove smo med sabo kombinirali v različne sestave lesnih kompozitov in jih nato lepili po vročem ali hladnem postopku. Iz teh lepljencev smo izdelali preskušance za ugotavljanje mehanskih lastnosti, vlažnosti in gostote. Po lepljenju smo izmerili in izračunali tudi izgubo debeline. Preizkus mehanskih lastnosti smo izvajali s pomočjo univerzalnega testirnega stroja Zwick Z100 po standardu SIST EN 310. Gostoto smo merili po standardu SIST EN 323, vlažnost pa po standardu SIST EN 322. Ugotovili smo, da so mehanske lastnosti lesnih kompozitov boljše kot mehanske lastnosti samega masivnega lesa. Prav tako pa imajo lesni kompoziti, zlepljeni po vročem postopku, boljše mehanske lastnosti od lesnih kompozitov, zlepljenih po hladnem postopku. Pri merjenju vlažnosti smo ugotovili, da ni bilo bistvenih razlik med masivnim lesom in lesnimi kompoziti Ugotovili smo tudi, da z lepljenjem lesa povečamo gostoto preskušancev. Lesni kompoziti, zlepljeni po vročem postopku, so imeli največjo, masiven les pa najmanjšo, gostoto. Mechanical properties of various wood species and glued composites, so as their applicability in construction purposes, were researched. Various test samples, prepared from different wood species (beech, pine, larch, lime, birch, alder), were glued in combinations using hot and cold gluing procedure. Combined samples were tested for mechanical properties, their moisture and density. After pressing, thickness loss was measured and calculated. Mechanical test was performed with Zwick Z100 machine according tostandard SIST EN 310; density according to standard SIST EN 323, and moisture according to standard SIST EN 322 were also measured. It was discovered that glued wood has better mechanical properties than massive wood,and also that samples made by hot gluing have better mechanical properties than those made by cold gluing. By measuring moisture it was proved that there was no essential difference between glued and massive wood. By density calculation it was found out that by gluing different species of wood the density of samples increases. Wooden composites made by hot gluing have greater density than massive wood. les kompoziti lepljenje mehanske lastnosti wood composites gluing mechanical properties true false false [D. Ščernjavič] Slovenski jezik Angleški jezik Diplomsko delo 2014-07-11 12:24:56 2014-07-11 12:24:56 2022-07-11 10:16:29 0000-00-00 00:00:00 2008 0 Ljubljana 0 X, 67 f., [19 f. pril.] 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 624.011 1646985 vs_scernjavic_danilo.pdf vs_scernjavic_danilo.pdf 1 417F5B3E89658F11428F63B21BD7DE6A 725bc594759c7bcd3fdb199d48f1d857bc5bf7f5373219daac0d5a2455c130c0 5c0cfc18-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/6c893441-a373-4f36-bed2-3466ba2daff0 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132289 Biotehniška fakulteta 0 0 0