BF, Dept. of Wood Technology, Lj. (BFLES)
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Gostota in sorpcijske lastnosti arheološkega lesa z ljubljanskega barja : diplomsko delo (univerzitetni študij) = Density and sorption characteristics of archaeological wood from ljubljana moor : graduation thesis (university studies)Kamenšek, FranciRaziskali smo 5 najpogosteje zastopanih vrst arheološkega lesa iz eneolitskih kolišč Ljubljanskega barja: jesen(Faxinus sp.), hrast(Quercus sp.), jelšo (Alnus sp.), javor(Acer sp.) in bukev(Fagus ... sylvatica). Les je bil star 4500-5500 let in se je ohranil pod zemljo ali pod vodo. Raziskali smo: osnovnogostoto, začetno vlažnost in ravnovesne vlažnosti pri 88%, 65% in 33% relativni zračni varnosti in temperaturi 20 C. Oblikovali smo sorpcijske izoterme, določili totalne skrčke in skrčke v posameznih intervalih krčenja. Lastnosti arheološkega lesa smo primerjali z lastnostmi recentnega lesa. Osnovna gostota je bila 92 kg/m3 - 155 kg/m3, bila je do 6 krat nižja kot pri recentnem lesu. Začetna vlažnost je bila 589% -1017%, oboje kaže na visoko stopnjo degradacije lesa. Ravnovesne vlažnosti so bile v vseh 3 klimah višja kot pri recentnem lesu, prav tako so bili večji totalni skrčki. Volumenski skrčki so bili 63,4% - 80,9%. v primerjavi z recentnim lesom se je najbolj povečalo krčenje v longitudinalni smeri. Najvišji etapni skrček se je realiziral na intervalu od napojenega stanja do RH=88%, najnižji pa od RH=65% do RH=33%. Našteti rezultati omogočajo boljše poznavanje lastnosti arheološkegalesa in pripravo strategije za pravilno obravnavanje in konzerviranje. Za ohranitev arheološkega lesa je najprej potrebno preprečiti njegovo izsušitev; začetna napojitvena vlažnost in osnovna gostota, pa sta osnovna podatka za prvo oceno stopnje njegove degradiranosti in ogroženosti.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [F.Kamenšek], 2002Language - slovenianCOBISS.SI-ID - 857737
Author
Kamenšek, Franci
Other authors
Čufar, Katarina |
Gorišek, Željko
Topics
arheološki les |
osnovna gostota |
začetna vlažnost |
ravnovesna vlažnost |
skrčki |
archaeological wood |
basic density |
initial moisture content |
equlibrium moisture content |
shrinkage
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Knjižnica BF za lesarstvo dn 0000000728 IN: 020020110 Knjižnica BF za lesarstvo dn 728 IN: 020020110 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Čufar, Katarina | 02937 |
Gorišek, Željko | 05732 |
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