magistrsko delo
Matic Radič (Author), Franc Pohleven (Reviewer), Miha Humar (Mentor), Katarina Čufar (Co-mentor)

Abstract

Les je pomemben material za izdelavo železniških pragov. Ker so železniški pragovi izpostavljeni možnosti napada lesnih škodljivcev (gliv in insektov) ter delovanju vremenskih vplivov, jih moramo ustrezno zaščititi. Za zaščito v Evropi uporabljamo predvsem kreozotno olje, ki bo zaradi Evropske direktive o biocidih dovoljeno samo še toliko časa, dokler ne bo razvita ustrezna alternativa. V magistrski nalogi smo v okviru izmenjave ERASMUS v laboratorijih Univerze Georg-August Göttingen, Nemčija, preizkušali na novo razvite baker-etanolaminske biocidne proizvode z delovnimi imeni 181, 169 in Impralit NN. Na lesu bukve (Fagus sylvatica), jedrovini hrasta (Quercus sp.) in beljavi rdečega bora (Pinus sylvestris) smo ugotavljali mokri navzem izbranih biocidnih proizvodov, preizkušali odpornost impregniranega lesa proti lesnim glivam, upogibno trdnost impregniranega lesa in vpliv zaščitnih sredstev na korozijo jeklenih elementov. Z umetnim pospešenim staranjem pa smo ocenili spremembe impregniranega lesa. Ugotovili smo, da je biocidni proizvod 181 na bakrovi osnovi dovolj učinkovit proti glivama razkrojevalkama Coniophora puteana in Trametes versicolor, in da impregnacija nima bistvenega vpliva na relevantne mehanske lastnosti impregniranega lesa. Biocidni proizvodi tudi niso bistveno vplivali na korozijo kovine. Pri pospešenem umetnem staranju pa je prišlo do manj razpok pri vzorcih, ki so bili zaščiteni z biocidom nižje koncentracije. Izkazalo se je, da so vsi trije zaščitni proizvodi v nekaterih lastnostih ustrezni, potrebno pa bo še izvesti dodatne raziskave, preden bi z njimi lahko nadomestili kreozotno olje.

Keywords

zaščita;baker-etanolaminski pripravki;impregnacija;lesne glive;korozivnost jeklenih elementov;nastanek razpok;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [M. Radič]
UDC: 630*84
COBISS: 2815113 Link will open in a new window
Views: 1029
Downloads: 287
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Testing of the alternative biocidal products for impregnation of railway sleepers
Secondary abstract: Wood is an important material used for railway sleepers. Because railway sleepers are exposed to moisture and various organisms (fungi and insects) we have to adequately protect them. For impregnation of railway sleepers in Europe creosote oil is predominately applied. However, according to the European Biocidal Guidelines, creosote oil will only be allowed for wood protection until a new adequate preservative is developed. In this work, prepared in the framework of the ERASMUS student exchange at the University Georg-August Göttingen, Germany, we tested three newly developed copper-ethanolamine biocidal products with working names 181, 169 and Impralit NN. We used them to protect the wood of beech (Fagus sylvatica), oak (Quercus sp.) and Scots pine (Pinus sylvestris) and tested the uptake of the preservatives, resistance of impregnated wood to fungal decomposition, bending strength of the impregnated wood and the influence of the selected preservatives on metal corrosion. With accelerated aging we also evaluated the changes in impregnated wood. We found that the copper-based preservative 181 proved to be sufficiently effective against the fungi Coniophora puteana and Trametes versicolor, and that the impregnation did not significantly affect relevant mechanical properties. Preservatives also did not significantly affect metal corrosion. During accelerated aging fewer cracks occurred in the wood samples impregnated with the biocide of lower concentration. In general, all three preservatives proved to have at least some appropriate properties, but it will be necessary to do further research before the studied biocides could replace the creosote oil.
Secondary keywords: protection;copper-ethanolamine preparation;impregnation;wood decay fungi;corrosion resistance;crack resistance;
Type (COBISS): Master's thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: VIII, 40 f.
ID: 10910341