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Kakovost poliuretanskega lepilnega spoja med lesom in jeklom
Škamlec, Marko (Author), Šernek, Milan (Mentor) More about this mentor... This link opens in a new window

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Abstract
Lepljeni lamelirani nosilci se uporabljajo v konstrukcijske namene. Potrebno jih je spajati z jeklenimi deli. Vijačenje jeklenih delov lahko zamenjamo z lepljenjem in tako povečamo togost spoja. V raziskavi smo proučevali kakovost poliuretanskega lepilnega spoja med lesom in jeklom. Uporabili smo tri različna enokomponentna poliuretanska lepila: COSMO PU–100.110, COSMO PU–180.150 in COSMO PU–190.110. Lesene lamele smo izdelali iz smrekovine in jih zlepili z jeklenimi lamelami. Preizkušance smo za 6 dni izpostavili trem različnim pogojem in sicer: standardni klimi, vlažni klimi ter namakanju v vodi. Izvedli smo test natezno strižne trdnosti spojev s preklopom po standardu SIST EN 205:2003 in določili delež loma po lesu. Kakovost lepilnega spoja med lesom in jeklom je bila odvisna od uporabljenega poliuretanskega lepila. Najboljše se je izkazalo lepilo COSMO PU–190.110, ki je po izpostavitvi standardni klimi doseglo strižno trdnost 8,49 N/mm2 in 53 % delež loma po lesu. Na kakovost lepilnega spoja je prav tako vplivala priprava preizkušancev pred testiranjem. Najboljše so se odrezali preizkušanci izpostavljeni standardni klimi in najslabše preizkušanci namočeni v vodo. Lepili COSMO PU–190.110 in COSMO PU–180.150 sta se izkazali kot uporabni za lepljenje jekla in lesa v suhih pogojih (standardna klima). Lepilo COSMO PU–100.110 se je izkazalo kot neuporabno za lepljenje jekla in lesa v proučevanih pogojih.

Language:Slovenian
Keywords:adhezija, poliuretansko lepilo, jeklo, les, lepilni spoj
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2017
Publisher:[M. Škamlec]
UDC:630*824.89
COBISS.SI-ID:2815881 Link is opened in a new window
Views:598
Downloads:260
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Secondary language

Language:English
Title:The quality of the polyurethane adhesive bond between wood and steel
Abstract:
Glued laminated beams are used for construction purposes. They need to be connected with steel parts. Instead of screws, adhesive can be used to increase joint stiffness. This research study focused on the quality of the polyurethane adhesive bond between wood and steel. Three different one-component polyurethane adhesives were used: COSMO PU–100.110, COSMO PU–180.150, and COSMO PU–190.110. The wooden lamellas were fashioned from spruce wood and bonded with steel lamellas. For six days, the test specimens were exposed to different conditions: standard climate, moist climate, and soaking in water. A test of the tensile shear strength of lap joints, determining the wood failure percentage, was performed according to the SIST EN 205:2003 standard. The quality of the adhesive bond between the steel and wood depended on the polyurethane adhesive used. The best results were achieved with COSMO PU–190.110, which after exposure to the standard climate reached a shear strength of 8.49 N/mm2 and 53% wood failure. The preparation of the test specimens prior to the test also affected the quality of the adhesive bond. The best results were achieved by the test specimens exposed to the standard climate; the worst results by those soaked in water. The COSMO PU–190.110 and COSMO PU–180.150 adhesives proved to be useful for bonding steel and wood in dry conditions (standard climate). In contrast, the COSMO PU–100.110 adhesive proved to be useless for bonding steel and wood in the studied conditions.

Keywords:adhesion, polyurethane adhesive, steel, wood, adhesive bond

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