Življenjska doba bukovine na prostem

Humar, Miha (author), Kržišnik, Davor (author), Lesar, Boštjan (author), Thaler, Nejc (author), Žlahtič, Mojca (author)

Bukovina sodi med najpomembnejše lesne vrste v Sloveniji. Standard SIST EN 350-2 uvršča bukovino med lesne vrste z najslabšo odpornostjo proti lesnim glivam. To je eden izmed najpomembnejših razlogov, ki preprečuje uporabo bukovine na prostem. Večina podatkov o odpornosti bukovine temelji na laboratorijskih testiranjih, realnih terenskih testov pa je relativno malo. Življenjska doba bukovine je v veliki meri odvisna od lokalnih podnebnih razmer, zato je nujno določiti življenjsko dobo posameznih lesnih vrst na prostem v osrednji Sloveniji. Na Oddelku za lesarstvo zato že več let potekajo testi, s katerimi določamo odpornost bukovine v tretjem razredu uporabe (na prostem, ni v stiku z zemljo). Prvi znaki glivnega razkroja se pojavijo že po nekaj mesecih izpostavitve, kasneje se razkroj nadaljuje, vzorci pa povsem propadejo po 4 do 6 letih izpostavitve. Glavni razlog za dovzetnost bukovine za glivni razkroj je povezan z odsotnostjo biološko aktivnih snovi (ekstraktivov) in dejstvom, da se bukovina relativno hitro navlaži. Z namenom proučiti dinamiko vlaženja bukovine smo petnajst mesecev stalno spremljali vlažnost lesa v različnih razmerah uporabe. Pričakujemo, da bomo skozi daljše obdobje spremljanja relevantnih lastnosti bukovine, preostalih lesnih vrst in modificiranega lesa pridobili podatke, ki bodo omogočili širšo rabo bukovega lesa na prostem.

• Language: Slovenian
• Keywords: bukev, Fagus sylvatica, naravna odpornost, razkroj, terenski testi, vlažnost lesa, življenjska doba
• Work type: Scientific work (r2)
• Tipology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Year: 2015
• Number of pages: str. 461-469
• Numbering: Letn. 73, št. 10
• UDC: 630*1
• ISSN on article: 0017-2723
• DOI: 181.71:176.1Fagus sylvatica(045)=163.6 (GDK)
• COBISS.SI-ID: 2473865
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Record is a part of a journal

• Title: Gozdarski vestnik
• Shortened title: Gozd. vestn.
• Publisher: Zveza gozdarskih društev Slovenije
• ISSN: 0017-2723
• COBISS.SI-ID: 3736834

Secondary language

• Language: English
• Title: Service life of beech wood in outdoor applications

Abstract

Beech wood is amongst the most important wood species in Slovenia. The EU standard EN 350-2 classifies beech wood into the group of the least durable wood species. This is one of the most important reasons which limit the use of beech wood in outdoor applications. The majority of the data about beech wood durability is a result of laboratory tests as there were limited numbers of field tests performed. As the service life of wood significantly depends on the local climate conditions, this data cannot be simply copied from other countries. Therefore, field tests have been running at the field test site of the Department of Wood Science and Technology for several years now to determine comprehensive performance of most important Slovenian wood species including beech wood. Majority of the tests are performed in use class 3 applications (above ground, not covered). The first signs of decay on beech wood are visible after few months of exposure. Afterwards the decay proceeds and the samples are degraded between 4 and 6 years of exposure. The most important reasons for insufficient outdoor performance of beech wood are lack of biologically active extractives and low water exclusion efficacy. In order to elucidate this phenomenon moisture content was continuously monitored for 15 months. We believe that the field tests performed will lead us to the data which will enable better understanding of the phenomena of durability and improve durability of beech wood with state of the art modification solutions.

• Keywords: bukev, Fagus sylvatica, naravna odpornost, razkroj, terenski testi, vlažnost lesa, življenjska doba