Odpornost termično modificiranega lesa na hišnega kozlička : diplomski projekt

Mikuš, Blaž (author), Pohleven, Franc (mentor), Humar, Miha (reviewer)

Stavbno pohištvo iz masivnega lesa postaja vedno bolj aktualno. Naravna odpornost ter konstrukcijska zaščita lesa ne prepreči vedno napada hišnega kozlička (Hylotrupes bajulus L.). Kemična zaščita z biocidi pa je v veliki meri okolju škodljiva. Zato se v zadnjem času uveljavlja nekemičen način zaščite s termično modifikacijo. Da bi preverili učinkovitost zaščite, smo določali odpornost termično modificiranega lesa na hišnega kozlička po standardu SIST EN 46. Vzorce smo termično modificirali pri temperaturi 170, 190, 210 ter 230 °C. Ugotovili smo, da se odpornost vzorcev beljave smrekovine in borovine na napad larv hišnega kozlička, med seboj ne razlikujejo. Kontrolni vzorci pri obeh vrstah lesa ne izkazujejo prav nobene odpornosti. Delno odpornost izkazujejo vzorci, termično modificirani pri temperaturi 170 °C. Z višanjem temperature modifikacije od 190 do 230 °C pa modificiran les postane popolnoma odporen na napad hišnega kozlička. Odpornost termično modificiranega lesa je odvisna od temperature modifikacije; pri višji temperaturi je torej odpornost večja.

• Language: Slovenian
• Keywords: les, hišni kozliček, odpornost, termična modifikacija
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [B. Mikuš]
• Year: 2012
• Number of pages: VIII, 38 f.
• PID: 20.500.12556/RUL-672
• UDC: 630*845.5
• COBISS.SI-ID: 2045321
• Publication date in RUL: 11.07.2014

Secondary language

• Language: English
• Title: Resistance of thermaly modified wood to Hylotrupes bajulus L. : B. Sc. thesis

Abstract

Building furniture made from massive wood is becoming more and more popular. Intrinsic resistance and structural protection of the wood do not always help against the attack of Hylotrupes bajulus (Hylotrupes bajulus L.). Its attack can be prevented by chemical wood protection with biocides, which are on the other hand harmful to the environment. Therefore, during the past years the non-chemical way to protect the thermal modification is coming into usage. Thermally modified wood resistance to Hylotrupes bajulus was tested according to the standard SIST EN 46. Samples were thermally modified at the temperature 170, 190, 210 and 230 °C. It was found out that the sapwood samples of Norway spruce and Scotch pine regarding the volume of damage caused by larvae do not differentiate. We found out that samples of Norway spruce and Scots pine do not differ one from another as far as maggots' attacks are concerned. Control samples of both types of wood didn't show any protection whatsoever. There is also no perfect protection in samples which were thermally modified at the temperature of 170 °C. Boosting the temperature from 190 to 230 °C the wood resistance to attack of Hylotrupes bajulus is total. Thermally modified wood resistance depends on the modification temperature; the higher the temperature the higher the resistance level.

• Keywords: wood, Hylotrupes bajulus, resistance, thermal modification