20.500.12556/RUL-189886 Odziv obžganega lesa na ogenj Reaction of charred wood to fire V sodobni lesni industriji se zaradi teženj po trajnosti in zmanjšanju uporabe kemičnih zaščitnih sredstev ponovno uveljavljajo naravne metode obdelave lesa. Med njimi izstopa tradicionalna japonska tehnika yakisugi (ali shou sugi ban), ki s pomočjo ognja in naravnih olj poveča odpornost lesa proti vremenskim vplivom ter izboljša njegov estetski videz. V raziskavi preučujemo odziv obžganega smrekovega lesa na ogenj ter vpliv dodatne obdelave s tungovim oljem, saj so znanstveni podatki o tej metodi v literaturi še vedno pomanjkljivi. Raziskava je temeljila na primerjavi neobdelanih, samo obžganih, naoljenih ter krtačenih vzorcev. Rezultati so pokazali, da obžiganje lesa zagotavlja primerljiv odziv na ogenj v primerjavi z neobdelanim lesom, s čimer smo potrdili prvo delovno hipotezo. Pri preizkusih z metodo malega plamena se je gorenje pojavilo le pri sistemih, ki so bili predhodno naoljeni, medtem ko je samo obžgan les izkazal dobro stabilnost. Analiza izgube mase in navzema olja je razkrila razlike med različno pripravljenimi površinami, pri čemer je kombinacija obžiganja in krtačenja vplivala na značilnosti navzema olja. Potrdili smo tudi drugo hipotezo, saj krtačenje obžganega lesa na površini ni bistveno vplivalo na izgubo mase ob izpostavljenosti gorenju. Ugotovitve potrjujejo, da obžiganje predstavlja učinkovito in okolju prijazno alternativo za obdelavo fasadnih oblog, ki ohranja vizualno vrednost in ustrezno požarno varnost. Traditional natural wood treatment methods are regaining prominence in the modern timber industry, driven by trends towards sustainability and a reduction in the use of chemical preservatives. Among these, the Japanese technique of yakisugi (or shou sugi ban) stands out, using fire and natural oils to enhance the wood’s resistance to weathering and improve its aesthetic appearance. This study examines the fire response of charred spruce wood and the influence of additional treatment with tung oil, as scientific data on this method remain limited in the literature. The research was based on a comparison of untreated, solely charred, oiled, and brushed samples. The results showed that charring the wood provides a comparable fire response to that of untreated wood, thereby confirming the first working hypothesis. In small flame tests, ignition occurred only in systems that had been previously oiled, whereas charred-only wood demonstrated good stability. Analysis of mass loss and oil uptake revealed differences between differently prepared surfaces, with the combination of charring and brushing affecting oil absorption characteristics. The second hypothesis was also confirmed, as brushing the charred wood surface did not significantly affect mass loss during fire exposure. The findings confirm that charring represents an effective and environmentally friendly alternative for the treatment of façade cladding, maintaining visual quality and providing adequate fire safety. obžiganje lesa tungovo olje shou sugi ban gorljivost v cevi metoda mali plamen wood charring tung oil shou sugi ban combustion in a tub single-flame source test true false true [L. Pirc] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-10-18 07:15:25 2026-10-18 07:15:54 2026-10-19 09:21:12 0000-00-00 00:00:00 2026 0 Ljubljana 0 1 spletni vir (1 datoteka PDF (VIII, 28 str., [2] f. pril.)) 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*829.1:843(043.2) 299256 301402115 62071.pdf 62071.pdf 1 CD7426047AE1A1FC233BF7A674413855 dd6f5394d49b9a29a058687cbedd692b150f94a34640a25a416cc279a3dfda5e da787108-cab2-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=250793 Biotehniška fakulteta 0 0 0