diplomski projekt
Jože Planinšič (Author), Franc Pohleven (Reviewer), Miha Humar (Mentor)

Abstract

Navadna smreka je najbolj razširjena drevesna vrsta pri nas. Njen les uporabljamo tudi v gradbeništvu. Pri uporabi v višjih razredih izpostavitve je lesne izdelke treba zaščititi pred okužbo gliv in napadi insektov. Podaljšanje trajnosti lesa pomeni nižje stroške vzdrževanja in izboljšanje zanesljivosti infrastrukture. Za zaščito lesa pogosto uporabljamo bakrove pripravke. Da bi preverili stanje bakrove učinkovine pri starejših telekomunikacijskih drogovih in ograji, kjer je bil les globinsko impregniran z bakrovimi pripravki, smo pripravili vzorce za določanje radialne distribucije Cu, za ugotavljanje fungicidnih lastnosti in določanje vezave Cu v lesu. Oba izdelka sta bila v četrtem razredu izpostavitve. Za analize Cu smo uporabili rentgensko fluorescenčno spektroskopijo (XRF). Ugotovili smo, da se vsebnost Cu niža od vrha proti dnu droga. V zgornjem delu droga zasledimo Cu in Cr po celem preseku. Pri kolutu iz srednjega dela sta Cu in Cr še samo v prvih 6 cm. Pri kolutu iz dna pa sta prisotna do 4 cm v globino. Glede na fungicidne lastnosti smo ugotovili, da je vrhnji del droga veliko odpornejši od dna. Vzorci, izdelani iz droga in ograje, so pri izpostavitvi glive %in vitro% v povprečju imeli 14 % izgube mase, ki nam kaže, da les ni več za uporabo. Pri določanju vezave smo prišli do zaključka, da se je pripravek med uporabo izpral do te mere, da z našim poskusom praktično nismo zaznali izpiranja.

Keywords

biocidni proizvodi;smreka;lesne glive;izpiranje;bakrovi proizvodi;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [J. Planinšič]
UDC: 630*841.4
COBISS: 2278025 Link will open in a new window
Views: 376
Downloads: 96
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Other data

Secondary language: English
Secondary title: Fungicidal properties of naturally aged spruce impregnated with copper based preservatives
Secondary abstract: Norway spruce is one of the most frequent tree species in our region, and it is frequently used for construction applications. When used in higher use classes, it has to be protected against attacks by fungi and insects. Prolongation of wood service life is important for lower maintenance costs and increased reliability of the infrastructure. To protect spruce wood in hazardous environment, copper based wood preservatives are frequently used. To elucidate what is happening with Cu substances in the old telecommunication poles and fence, impregnated with Cu products, samples of various types were prepared for radial distribution of Cu, for determining the fungicidal properties and for determination of Cu fixation in the wood. All investigated material was used in the fourth use class. Using X-ray fluorescence spectroscopy (XRF for Cu analysis) we found out that the content of Cu was lowering from the top to the bottom of the pole. Cu and Cr was traced all over the pole in the upper part of the pole. In the reel cut from the middle part, Cu and Cr were traced only in the first 6 cm; in that taken from the bottom just to 4 cm in the interior. Fungicidal properties revealed the upper part of the pole to be much more resistant than the bottom. An average weight loss of the samples exposed to the fungus 'in vitro' was 14 %, showing that wood was no longer of use. Fixation experiment clearly indicated that there was no sign of leaching, as the Cu was fixed in wood and all of the unreacted Cu already leached from the wood during its service life.
Secondary keywords: biocidal products;spruce;wood decay fungi;leaching;copper products;
Type (COBISS): Diploma project paper
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: VIII, 29 f.
ID: 11908577