diplomsko delo
Gašper Bizjak (Author), Boštjan Lesar (Reviewer), Miha Humar (Mentor)

Abstract

Za namen raziskave smo postavili modelne klopi na 7 lokacij (Pesnica, Ljubljana, Velika planina, Bilje, Jamlje, Seča in Škocjanski zatok). Klopi so bile izdelane iz neobdelane, s Silvanolinom zaščitene in termično modificirane smrekovine. Po dveh letih smo iz vsake klopi vzeli vzorce in jih shranili v temnem suhem prostoru. V času raziskave smo na klopeh merili vlažnost in barvo. V okviru te diplomske naloge smo preverili indikatorje, ki kažejo na razkrojenost lesa. Po dveh letih smo vzorcem določili barvo (CIELab), hrapavost (laserska konfokalna mikroskopija) in kontaktni kot vode v stiku z lesom. Z uporabo digitalne mikroskopije smo ocenili prisotnost gliv modrivk in razkrojevalk. Na koncu smo še vzorcem, zaščitenim s Silvanolinom, določili, koliko bakra je ostalo v vzorcu po 2 letih izpostavitve. Rezultati so pokazali, da termična modifikacija in impregnacija lesa učinkovito upočasnjujeta razkrojne procese, saj se je pojav gliv modrivk pojavil večinoma le pri nezaščiteni smrekovini, medtem ko sta termično modificirana smrekovina in smrekovina, zaščitena s Silvanolinom, pokazali boljše rezultate. Prav tako so rezultati potrdili, da so razkrojni procesi odvisni od mikroklimatskih pogojev posamezne lokacije, saj je bila vlažnost lesa najvišja na lokacijah z največ deževnimi dnevi.

Keywords

lesene klopi;izpostavitev;razkroj;vremenski vplivi;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [G. Bizjak]
UDC: 630*842:844.1
COBISS: 205000707 Link will open in a new window
Views: 18
Downloads: 2
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Other data

Secondary language: English
Secondary title: Conditions of model wooden benches after two years of outdoor exposure
Secondary abstract: For the purposes of the research, we set up model benches at seven locations (Pesnica, Ljubljana, Velika planina, Bilje, Jamlje, Seča and Škocjanski zatok). The benches were made of untreated spruce wood, spruce wood treated with Silvanolin and thermally modified spruce wood. After two years samples were taken from each bench and stored in a dark, dry place. During the study, we measured the moisture content and colour of the benches. As part of this work, we analysed indicators of wood decay. After two years, we determined the colour (CIELab) and roughness (laser confocal microscopy) of the samples as well as the contact angle of water in contact with the wood. Using digital microscopy, we assessed the presence of blue stain fungi and decay fungi. Finally, we measured the residual copper content in Silvanolin-treated samples after two years of exposure. The results showed that thermal modification and wood impregnation effectively slow down decomposition processes, as the occurrence of blue stain fungi was mostly observed only in untreated spruce, while thermally modified spruce and spruce protected with Silvanolin showed better results. The results also confirmed that decomposition processes depend on the microclimatic conditions of each location, as the wood moisture content was highest at locations with a lot of rain.
Secondary keywords: wooden benches;exposure;decomposition;weathering;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: 1 spletni vir (1 datoteka PDF (VI, 34 str.))
ID: 24862724