Kakovost epoksidnega lepilnega spoja med lesom in jeklom

Lobnik, Jure (author), Šernek, Milan (mentor)

V raziskavi smo proučevali kakovost epoksidnega lepilnega spoja med lesom in jeklom. Ugotavljali smo vpliv priprave površine jekla na strižno trdnost lepilnega spoja. Površine jekla so bile obdelane na štiri različne načine, in sicer neobdelana, grobo brušena, polirana in žlebičeno polirana površina. Za lepljenje smo uporabili dvokomponentno epoksidno lepilo Xepox 40. Lesene lamele so bile izdelane iz smrekovega lesa. Ko smo lesene in jeklene lamele zlepili in je lepilo utrdilo, smo polovico preizkušancev izpostavili standardni klimi, polovico pa smo 24 ur namakali v vodi. Nato smo opravili test strižne trdnosti po standardu SIST EN 205:2003. Po porušitvi preizkušanca smo ocenili delež loma po lesu. Ugotovili smo, da na strižno trdnost lepilnega spoja vpliva predhodna obdelava površine jekla. Med preizkušanci, ki so bili izpostavljeni standardni klimi, so najboljše rezultate dosegli preizkušanci, pri katerih je bila površina jekla polirana, medtem ko so po 24-urnem namakanju največjo strižno trdnost dosegli preizkušanci, ki so imeli neobdelano površino jekla. V splošnem je bila strižna trdnost spoja namočenih preizkušancev bistveno manjša kot klimatiziranih preizkušancev. Na osnovi rezultatov lahko zaključimo, da je dvokomponentno epoksidno lepilo Xepox 40 primerno za lepljenje lesa in jekla za uporabo v suhih pogojih.

• Language: Slovenian
• Keywords: epoksidno lepilo, jeklo, les, adhezija, lepilni spoj
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [J. Lobnik]
• Year: 2018
• PID: 20.500.12556/RUL-103356
• UDC: 630*824.89
• COBISS.SI-ID: 2945161
• Publication date in RUL: 16.09.2018

Secondary language

• Language: English
• Title: The quality of the epoxy adhesive bond between wood and steel

Abstract

The research study focused on the quality of the epoxy adhesive bond between wood and steel. We studied the influence of surface preparation of steel on shear strength. The steel surfaces were prepared in 4 different ways: untreated, roughly brushed, polished and guttered polished. Two-component epoxy adhesive Xepox 40 was used. Wooden lamellas were made from spruce wood. When the wooden and steel lamellas were glued and the adhesive was cured, we exposed them to two different conditions (standard climate and soaking in water for 24 hours). We performed our next test according to the SIST EN 205:2003 standard. After the test, we estimated the wood failure percentage. As expected, the shear strength was affected by the preliminary surface preparation of steel. Out of the test specimens that were exposed to the standard climate, the best results were achieved by the one with polished steel surface, while after 24 hours of soaking in water, the highest shear strength was achieved by the test specimens with untreated steel surface. In general, the shear strength of test specimens that were exposed to water was significantly lower than the air-conditioned specimens. Based on these results, it can be concluded that the two-component epoxy adhesive Xepox 40 is suitable for gluing wood and steel for use in dry conditions.

• Keywords: epoxy adhesive, wood, steel, adhesion, adhesive bond