BF, Dept. of Wood Technology, Lj. (BFLES)
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Lepljenje termično modificiranega lesa : diplomsko delo - visokošolski strokovni študij = Bonding of thermaly modified wood : graduation thesis - higher professional studiesKumer, MarkoSmrekove lamele smo modificirali v vakuumski komori pri petih različnih temperaturah, od 160 °C do 210 °C. Šesta skupina lamel je bila testna in ni bila termično modificirana. Modificiranim lamelam ... smo izmerili izgubo lesne mase, ki je bila posledica termične obdelave. Potrdili smo, da obstaja korelacija med višino temperature in izgubo lesne mase, pri čemer višine izgube mase pri določeni temperaturi ni mogoče z gotovostjo napovedati. Lamele smo lepili v pare z urea-formaldehidnim (UF) in fenol-formaldehidnim (FF) lepilom. Iz zlepljenih parov lamel smo izžagali testne vzorce, kot predpisuje standard SIST - TS CEN/TS 133354: 2004. Vzorce smo pred testiranjem izpostavili trem različnim pogojem; (1) standardni klimi s 65 % zračno vlažnostjo in 20 °C, (2) za 24 ur smo jih potopili v hladno vodo z 20 °C in (3) jih 6 ur kuhali ter nato še eno uro ohlajali v hladni vodi. Ugotavljali smo strižno trdnost glede na stopnjo termične modifikacije in uporabljeno lepilo. Ocenjevali smo tudi delež loma po lesu in lepilu. Ugotovili smo, da stopnja modifikacije vpliva na lepljenje masivnega lesa in sicer strižna trdnost za obe lepili pada z naraščajočo temperaturo modifikacije. Za FF lepilo lahko rečemo, da je primerno za lepljenje izdelkov namenjenih notranji uporabi v vlažnih pogojih, med tem ko je UF lepilo omejeno na lepljenje izdelkov namenjenih notranji uporabi s suho klimo.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [M. Kumer], 2016Language - slovenianCOBISS.SI-ID - 2670729
Author
Kumer, Marko
Other authors
Šernek, Milan |
Humar, Miha
Topics
lepljenje lesa |
lom po lesu |
strižna trdnost |
termična modifikacija |
bonding |
wood failure |
shear strength |
heat treatment
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Knjižnica BF za lesarstvo vsn 0000000435 IN: 020160205 Knjižnica BF za lesarstvo vsn 435 IN: 020160205 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Kumer, Marko | ![]() |
Šernek, Milan | 16382 |
Humar, Miha | 19106 |
Source: Personal bibliographies
and: SICRIS
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