magistrsko delo
Maja Odlazek (Author), Maks Merela (Reviewer), Miha Humar (Mentor), Boštjan Lesar (Co-mentor)

Abstract

V bližnji prihodnosti naj bi po napovedih zaradi klimatskih sprememb, sprememb sestave gozdov in tudi istočasnega povečevanja porabe lesa le tega začelo primanjkovati. Posledično se bodo v gozdovih in kasneje tudi na trgu pojavile drevesne vrste, ki jih do sedaj še nismo izrabljali v komercialne namene, med te sodijo tudi za naše kraje invazivne vrste lesa. Naravna odpornost le teh v večini primerov še ni poznana, zato smo se v sklopu magistrskega dela osredotočili na teste s katerimi smo določili naravno odpornost, gostoto, hitrost navlaževanja in vpijanja vode, kontaktni kot vode na lesu, hitrost vpijanja vode s tenziometrom, izgubo mase ter na podlagi teh podatkov izračunali relativno življenjsko dobo lesa petih izbranih invazivnih vrst (amerikanski javor, navadni divji kostanj, veliki pajesen trnata gledičevka in robinija). Testirali smo tako nemodificiran kot termično modificiran les pri različnih temperaturah modifikacije. Ugotovili smo, da lahko s termično modifikacijo vrstam s slabšo naravno odpornostjo le to izboljšamo, obenem pa se izboljšajo tudi nekatere druge relevantne lastnosti lesa. Med najbolj odporni vrsti lesa, z ocenjeno najdaljšo življenjsko dobo sodita robinija in trnata gledičevka, najslabše rezultate pa smo zabeležili pri amerikanskemu javorju.

Keywords

odpornost lesa;navlaževanje;glive razkrojevalke;termična modifikacija;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [M. Odlazek]
UDC: 630*844.2
COBISS: 28415491 Link will open in a new window
Views: 497
Downloads: 110
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Other data

Secondary language: English
Secondary title: Inherent durability and wetting ability of thermaly modified invasive wood species
Secondary abstract: In the near future, due to climate change, changes in the composition of forests and at the same time the increase of wood consumption only began to be lacking wood. As a result tree species will appear in the forests and later on the market, which we have not yet used for commercial purposes including invasive wood species for our places. The natural resistance of these in most cases is not yet known, so as part of the master's thesis we focused on tests to determine the natural resistance, density, rate of wetting and absorption of water, contact angle of water on wood, rate of water absorption with tensiometer, weight loss and based on these data, calculated the relative lifespan of the wood of the five selected invasive species (Box elder, Horse chestnut, Ailanthus, Honey locust and Black locust). Both unmodified and thermally modified wood were tested at different modification temperatures. We have found that thermal modification of species with poorer natural resistance can only improve this, while also improving some other relevant properties of wood. Among the most resistant species of wood, with an estimated longest lifespan, are Black locust and Honey locust and the worst results were recorded in Box elder.
Secondary keywords: wood resistance;humidification;wood decay fungi;thermal modification;
Type (COBISS): Master's thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: XI, 69 f.
ID: 12035083