diplomsko delo
Kristjan Krt (Author), Sergej Medved (Reviewer), Miha Humar (Mentor), Davor Kržišnik (Co-mentor)

Abstract

V zadnjem času opažamo porast uporabe lesa, predvsem v gradbeništvu. Poleg vseh dobrih mehanskih in fizikalnih lastnosti je za les značilna tudi neodpornost proti abiotičnim in biotičnim dejavnikom. Čeprav se les s svojimi naravnimi mehanizmi zaščiti pred visokimi temperaturami, ga moramo kljub vsemu dodatno zaščititi pred gorenjem z uporabo ognjezadrževalnih sredstev, saj je ogenj najhitrejši mehanizem uničevanja lesa. Ker živimo v toplem in vlažnem okolju, obstaja verjetnost, da bo les izpostavljen tudi glivam, zato je pomembno, da uporabljeno ognjezadrževalno sredstvo deluje tudi fungicidno. Kot perspektivno ognjezadrževalno sredstvo se v zadnjem času omenja Burnblock, zato nas je, poleg zaščite proti gorenju in visokim temperaturam, zanimalo njegovo fungicidno ali fungistatično delovanje. Uporabili smo glivi pisana ploskocevka (Trametes versicolor) in navadna tramovka (Gloeophyllum trabeum) ter kasneje primerjali rezultate. Vzorce smo zaščitili s potapljanjem in impregnacijo. Poleg ognjevarnostnih in razkrojnih testov smo izvedli tudi meritve pri navlaževanju v 100 % relativni zračni vlažnosti ter teste v povezavi s hidrofobnostjo vzorcev. Zaščiteni vzorci so se izkazali za manj dovzetne za dodatno navlaževanje in posledično razvoj gliv. Pri ognjevarnostnih testih so se zaščiteni vzorci v primerjavi z nezaščitenimi obnesli bolje predvsem pri obremenitvi z neposrednim plamenom, saj se noben od zaščitenih ni vžgal ali izrazito poškodoval. Razkrojni testi so pokazali, da gliva nezaščitene vzorce prerašča lažje kot zaščitene. Ugotovili smo, da lahko Burnblock uvrstimo med sredstva, ki delujejo tako ognjezadrževalno kot tudi fungicidno.

Keywords

les;razkroj;ogenj;glive;zaščita lesa;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [K. Krt]
UDC: 630*843.1
COBISS: 109924867 Link will open in a new window
Views: 109
Downloads: 29
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Other data

Secondary language: English
Secondary title: Performance of wood treated with fire retardant product against wood decay fungi
Secondary abstract: Recently, we have seen a large increase in the use of wood, especially in construction. Although it has many good mechanical and physical properties, wood is also known for its poor resistance to abiotic and biotic factors. Fire is the fastest destroyer of wood, so we need to take care of fire protection in buildings. In the case of high temperatures, wood naturally takes care of itself with its own mechanisms. Nevertheless, we can further improve its resistance to burning. Because we live in a warm and humid environment, wood is also likely to be exposed to fungi. For this reason, we used Burnblock fire retardant, and were interested whether, in addition to protection against burning and high temperatures, we would also observe a fungicidal or fungistatic effect. In this experiment we used the fungi Trametes versicolor and Gloeophyllum trabeum and then we compared the results. The samples were protected by immersion and impregnation. In addition to fire and deterioration tests, we also performed measurements of humidification in 100% relative air humidity and tests in relation to the hydrophobicity of the samples. The protected specimens have been shown to be less susceptible to additional moistening and consequential fungal development. In fire tests, the protected samples performed better than the unprotected ones, as none of the protected ones caught fire or got severely damaged. The deterioration tests showed that the fungus grew in the unprotected specimens more easily in than the protected ones. In this diploma thesis, we came to the conclusion that Burnblock can be classified as an agent that has both fire retardant fungicidal effects.
Secondary keywords: wood;deterioration;fire;fungi;wood protection;
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: VII, 32 f.
ID: 15456741