diplomsko delo
Gregor Ocvirk (Author), Milan Šernek (Reviewer), Sergej Medved (Mentor)

Abstract

V kmetijstvu vsako leto tekom pridelave krmnih in ostalih rastlin pridelamo tudi velike količine kmetijskih ostankov. Večina le-teh nima druge uporabnosti kot te, da se jih uporabi kot gnojilo ali pa sežge kot odpad. Hmelj gojimo zaradi pridelave storžkov, ki se uporabljajo za proizvodnjo piva in ob tem proizvedemo velike količine neuporabljene bio mase. Spomladi korenino hmelja obrežemo in s tem odstranimo enoletne olesenele poganjke, ki jih nato odstranimo s polja in sežgemo. V naši diplomski nalogi smo te enoletne poganjke hmelja zdrobili v iveri in iz njih izdelali iverne plošče, lesno-plastični kompozit, ter sestavljen ploščni kompozit. Izdelanim ploščam smo izmerili gostoto, vlažnost, debelinski nabrek, modul elastičnosti, upogibno trdnost, natezno trdnost in razslojno trdnost. Dobljene rezultate smo primerjali z referenčnimi ploščami iz iveri iglavcev. Ugotovili smo, da so vezi med gradniki dovolj močne za prenašanje obremenitev. Z uporabo hmelja zmanjšamo debelinski nabrek. Za izdelavo WPC in sestavljenih ploščnih kompozitov je uporaba hmelja smotrna.

Keywords

hmelj;iverna plošča;upogibna trdnost;natezna trdnost;debelinski nabrek;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [G. Ocvirk]
UDC: 630*86: 633.791
COBISS: 48873987 Link will open in a new window
Views: 390
Downloads: 68
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Other data

Secondary language: English
Secondary title: Use of hop roots for different wood-based composites
Secondary abstract: The agricultural sector produces large quantities of agricultural residues every year during the production of fodder and other plants. Most of these have no other use than to be used as fertilizer or incinerated as waste. Thus, even in the production of hops (grown because of the cones used to produce beer) we produce large amounts of unused biomass. In the spring, the hop root is pruned to remove the annual woody shoots, which are removed from the field and burned. In our graduation thesis, we used these one-year-old hop shoots to make particles for chipboard, wood-plastic composite, and sandwich composite. The density, humidity, thickness swelling, modulus of elasticity, bending strength, tensile strength and internal bond strength were determined. The obtained results were compared with reference panel made of coniferous chips. We found that the bonds between the particles are strong enough to withstand the loads. The use of hops has a positive effect on thickness swelling, and is practical for the production of WPC and sandwich composites.
Secondary keywords: hops;particle board;bending strength;tensile strength;thickness swelling;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: VII, 25 f.
ID: 12506132