20.500.12556/RUL-158794 Lepljen lameliran les iz bukovine diplomsko delo - visokošolski strokovni študij Beech glued laminated timber graduation thesis - higher professional studies Iz bukovih lamel smo s 4 različnimi lepili (MUF, PUR, PUR v kombinaciji s primerjem in EPI) izdelali po 3 štirislojne lamelirane lepljene nosilce, iz katerih smo nato naredili preizkušance za strižni preizkus in preizkus delaminacije. Za vsako lepilo smo imeli različne tehnološke parametre lepljenja, ki so bili določeni po navodilih proizvajalca lepila. Strižno trdnost lepilnih spojev in odpornost proti delaminaciji smo preverjali po standardu SIST EN 14080:2013. Pri preizkusu delaminacije smo merili odprtost lepilnih spojev po namakanju in sušenju preskušancev, pri strižnem preizkusu pa smo ugotavljali največjo strižno trdnost lepilnih spojev. Ugotovili smo, da se je pri preizkusu delaminacije najboljše izkazalo MUF lepilo ter PUR lepilo v kombinaciji s primerjem. Spoji izdelani s PUR lepilom brez primerja in spoji z EPI lepilom niso dosegli zahtev standarda. V strižnem preizkusu so se pri vseh lepilih pokazali dobri rezultati, najboljši pa so zopet bili pri MUF lepilu ter PUR lepilu v kombinaciji s primerjem. From beech lamellaes and four different adhesives (MUF, PUR, EPI and PUR in combination with a primer) we made twelve 4 layered, glued laminated beams (three of each). From these beams we made test specimens for shear test and delamination test. We had to follow different technological parameters for each adhesive, according to the manufacturer's instructions. Shear strenght of adhesives bonds and resistance to delamination, we checked in accordance with SIST EN 14080 : 2013 standard. In the delamination test, we were measuring oppeness of the adhesive bonds, after immersion in water and drying, while in the shear test, we were measuring a maximum breaking force of the test specimens. We have discovered, that in the delamination test, we get the best results with MUF and PUR + primer adhesives. Bonds, made with only PUR adhesive and bonds with EPI adhesive did not meet requirements of the standard. In shear test, all the adhesives that we have used were suitable, however the best results were again with MUF and PUR + primer adhesives. lepljenje lepljeni nosilci delaminacija strižna trdnost bukovina gluing laminated timber delamination shear strength true false false K. Pecman Slovenski jezik Angleški jezik Diplomsko delo 2024-06-20 13:13:00 2024-06-20 13:13:04 2024-07-05 03:21:12 0000-00-00 00:00:00 2016 0 Ljubljana 2016 Ljubljana IX, 51 f., [24] f. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*824.8 2658697 UNI_Pecman_Klemen_2016.pdf UNI_Pecman_Klemen_2016.pdf 1 94FD5B63B20BFEEF0F9C55D7A4476A4B 133c818cccab0f3640c83f7fdb3471e6ad2982f4c79072588bcd65c4f28fd000 1097ff97-2ef6-11ef-a73e-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186516 Biotehniška fakulteta 0 0 0