Miha Humar (Author), Boštjan Lesar (Author), Davor Kržišnik (Author), Miha Humar (Author), Boštjan Lesar (Author), Davor Kržišnik (Author)

Abstract

Velika večina drevesnih vrst iz slovenskih gozdov nima odpornega lesa, zato na prostem (pre)hitro propade. Kadar les uporabljamo v gospodarske namene, želimo te procese čim bolj upočasniti. V okviru raziskave smo v ta namen les izbranih domačih drevesnih vrst (navadne smreke (Picea abies), les smrekovih lubadark, bele jelke (Abies alba), beljave in jedrovine rdečega bora (Pinus sylvestris), jedrovine evropskega macesna (Larix decidua), navadne bukve (Fagus sylvatica), belega gabra (Carpinus betulus) in jedrovine robinije (Robinia pseudoaccacia)) impregnirali z baker-etanolaminskim biocidnim proizvodom oziroma jih termično modificirali. Vzorce smo leta 2007 izpostavili na terensko polje Oddelka za lesarstvo v Ljubljani, kjer smo vsako leto ocenjevali razkrojenost. Najhitreje so propadli vzorci gabra in bukve. Prvi razkroj na smrekovini se je pojavil po dveh letih. Les lubadark je začel trohneti leto pred referenčno smrekovino, macesnovina in jedrovina bora pa leto kasneje. Najbolje se je izkazal les robinije. Z impregnacijo smo uspešno zaščitili les iglavcev, pri bukovini in gabrovini smo bili manj uspešni. Termična modifikacija se je izkazala za uspešen postopek zaščite za vse preizkušane lesne vrste.

Keywords

les;naravna odpornost;razkroj;modifikacija lesa;impregnacija lesa;

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 630*81
COBISS: 177022467 Link will open in a new window
ISSN: 0017-2723
Views: 11
Downloads: 5
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Other data

Secondary language: English
Secondary title: Odpornost lesa izbranih lesnih vrst na prostem
Secondary abstract: The vast majority of wood from Slovenian forests is not durable, so it decays (too) quickly if used in outdoor applications. When we use wood for commercial purposes, we want to slow degradation processes down as much as possible. In the respective study, wood from selected native species (Picea abies, spruce bark beetle damaged wood, Abies alba, Pinus sylvestris, European larch, Larix decidua, Fagus sylvatica, Carpinus betulus and Robinia pseudoaccacia) was impregnated with a copper-ethanolamine biocide product or thermally modified. The samples were then exposed to the field test site of the Department of Wood Science and Technology in Ljubljana, where decomposition was assessed annually. The samples of hornbeam and beech decayed the fastest. The exposed hornbeam and beech wood started to decay a year before the reference spruce wood, and the decay at larch and pine heartwood was determined a year later. The first decomposition on the spruce appeared after two years. The best-performing wood was black locust. The impregnation successfully protected softwood species but was less successful for beech and hornbeam wood. Thermal modification proved to be a successful protection process for all species tested.
Secondary keywords: wood;natural durability;decay;wood modification;impregnation of wood;
Type (COBISS): Article
Pages: str. 219-227
Volume: ǂLetn. ǂ81
Issue: ǂšt. ǂ6/7
Chronology: 2023
ID: 21681972