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Mehanske in biološke lastnosti iverne plošče narejene iz odsluženega zaščitenega lesa : diplomsko delo
Krpan, Anja (Author), Medved, Sergej (Mentor) More about this mentor... This link opens in a new window, Humar, Miha (Co-mentor), Pohleven, Franc (Reviewer)

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Abstract
Količina odsluženega zaščitenega lesa je vsak dan večja, v prihodnosti pa bo se naraščala. Takšnega lesa ne smemo kar prosto odlagati ali sežigati. Tudi shranjevanje odsluženega lesa na posebnih deponijah je samo začasna rešitev. Ta material bo treba na nek način odstraniti ali pa vsaj zmanjšati njegovo toksičnost. Zato se raziskave osredotočajo na ponovno uporabo odsluženega zaščitenega lesa. Želeli smo ugotoviti, kakšne lastnosti bo imela iverna plošča, narejena iz odsluženega lesa. Uporabili smo iveri iz odpadnega električnega droga, ki je bil pred 50 leti zaščiten s CCA pripravkom. Del teh iveri smo očistili, tako da smo jih izprali z vodovodno vodo. Lastnosti izpranih iveri smo primerjali z neizpranimi, iverjem čiste jelke, industrijskim iverjem in bioremediiranim iverjem. Iz vseh tipov iveri smo izdelali vzorčne enoslojne iverne plošče. Naredili smo preizkus zlepljenosti iveri, sejalno analizo, kemijsko analizo z infrardečo spektroskopijo ter izračunali izgubo mase vzorcev po izpostavitvi glivam. Ugotovili smo, da bi bile mehanske lastnosti te plošče slabše, biološke pa zadovoljive. Neizprane iveri bi lahko uporabili za izdelavo srednjega sloja pri troslojni iverni plošči. Vendar le v manjši količini, od 10 % do 20 % deležu, katerega bi dodajali k industrijskemu iverju. Te iveri še vedno vsebujejo določeno vrednost biocidov, zato bi bile te iverne plošče primerne le za zunanjo uporabo.

Language:Slovenian
Keywords:odsluženi les, iverna plošča, izpiranje, CCA
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2008
Publisher:[A. Krpan]
Number of pages:IX, 48 f.
Place:Ljubljana
UDC:630*862:839.84
COBISS.SI-ID:1652361 Link is opened in a new window
Views:850
Downloads:244
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Secondary language

Language:English
Title:Mechanical and biological properties of particleboards made of impregnated wood removed from the service : graduation thesis
Abstract:
The amount of impregnated wood removed from the service is increasing daily, and the trend is going to continue in the future. This type of wood cannot be simply disposed or burnt, and storing it at waste depository is only a short-term solution. The material will either have to be disposed of in some way or its toxic components will have to be reduced. The research nowadays focuses mainly on recycling and reusing of impregnated wood removed from its service. We tried to define what properties/qualities of particleboards made from impregnated wood, removed from its service, would be. Particles made from electric posts treated by CCA impregnation 50 years ago were used. Several of these particles were washed with tap water. Their properties were then compared to those of unwashed particles, clean fir particles, industrial particles and bio-remedied particles. Later 1-layered particleboards were prepared from all above mentioned types of particles. The following tests were performed: adherence of particleboards, sieve analysis, chemical analysis with infrared spectroscopy, and calculation of mass loss to samples after exposure to wood decay fungi. The experiments showed, that the mechanical properties of such boards decreases, while biological remained unchanged. Unleached particles could be used for middle layer, for instance. However, this portion should not exceed 10 % - 20 % of the total amount. As this particles still contains some biocides, they are suitable for outdoors purposes mainly.

Keywords:recovered wood, particleboard, leaching, CCA

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