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Uporaba trislojnih ivernih plošč s povišano gostoto v konstrukcijske namene : diplomsko delo - univerzitetni študij = Three layer high density particleboard in construction use : graduation thesis - university studiesLalović, MitjaUgotavljali smo, kako izbrati najoptimalnejšo ploščo za konstrukcijske namene glede na mehansko-fizikalne lastnosti izdelanih preizkušancev. V samem eksperimentu smo izdelali 5 serij tri-slojnih ... ivernih plošč, ki so si bile različne predvsem po gostoti in končni debelini. Gostoto smo povišali v posameznih slojih. Uporabili smo mešano (bukovo in smrekovo) iverje, ki smo ga oblepili z urea-formaldehidnim lepilom (UF). Plošča A je bila kontrolna (lastnosti konvencionalne industrijske trislojne plošče), ostalim ploščam pa smo dodajali iverje zunanjega sloja v notranji sloj in obratno. Ploščama B in D smo glede na kontrolno ploščo A, dodali relativno malo iverja (A + cca. 10%) in dosegli velike spremembe. Pri ploščah C (A + 21,4 %) in E (A + 25,8 %) pa smo bolj pretiravali. Plošča C, kjer smo dodali 60 % CL v SL, je posledično dosegla enakomerno sestavo, zaradi velikih delcev v zunanjem sloju pa je po končanem stiskanju (pri odpiranju) prišlo do efekta povratne deformacije iveri. Vendar je kljub temu dosegla zelo dobre rezultate, izstopa v strižni trdnosti in strižni trdnosti po robu. Do podobnih povratnih deformacij iveri je prišlo tudi pri plošči E, kjer smo dodali največ delcev glede na kontrolno ploščo. Tu smo najbolj pretiravali in prišlo je do porušitve v plošči po odpiranju stiskalnice. Plošča se nam je razslojila in dosegla podobne rezultate kot kontrolna plošča, nekaterih preizkusov pa sploh nismo uspeli izvesti. Lahko sklepamo, da nam je uspelo določiti mejno količino delcev, ki jih še lahko dodamo, da ploščo izboljšamo. Količina je v območju med ploščo D in C. Vidimo pa lahko, kako že relativno majhna sprememba vpliva na končne lastnosti.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [M. Lalović], 2014Language - slovenianCOBISS.SI-ID - 2275721
Author
Lalović, Mitja
Other authors
Medved, Sergej |
Šernek, Milan
Topics
trislojna iverna plošča |
gostota |
gostotni profil |
panel |
lesni kompozit |
three-layer particleboard |
high density |
vertical density profile |
panel |
wood composite
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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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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Lalović, Mitja | |
Medved, Sergej | 15410 |
Šernek, Milan | 16382 |
Source: Personal bibliographies
and: SICRIS
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