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Primerjava izbranih lastnosti lesa beljave in jedrovine pri hrastu : diplomsko delo - visokošolski strokovni študij = Comparison of selected properties of oak sapwood and heartwood : graduation thesis - higher professional studiesKeše, RokV Sloveniji se dobavitelji masivne hrastovine pogosto soočajo s prepričanjem uporabnikov, da je les beljave manj trden oz. ima slabše mehanske lastnosti kot les jedrovine. Cilj raziskovalne naloge je ... bil preučiti osnovne mehanske lastnosti lesa beljave in jedrovine vrste hrastov, ki se največ pojavljajo na slovenskem tržišču. Vzorce smo odvzeli iz 26 hrastovih hlodov, pripravljenih za izdelavo železniških pragov, od katerih je bilo 16 hlodov (62 %) iz skupine belih hrastov (Quercus robur ali Quercus petraea) in 10 hlodov (38 %) iz skupine rdečih hrastov (Quercus cerris). Na vzorcih beljave in jedrovine smo izmerili upogibno trdnost in modul elastičnosti (MOE), tlačno trdnost, trdoto po Brinellu in gostoto. Primerjave merjenih lastnosti med posameznimi kategorijami lesa so razkrile, da ni tipičnih razlik med lastnostmi lesa beljave in jedrovine, pokazale pa so se statistično značilne razlike med lastnostmi lesa belega in rdečega hrasta. Rezultati tako zavračajo laično mnenje uporabnikov, da so mehanske lastnosti lesa beljave slabše kot lastnosti lesa jedrovine. Raziskave so tudi pokazale, da ima zaradi variabilnosti les cera lahko celo boljše mehanske lastnosti kot les doba ali gradna. Tudi to je v nasprotju s splošnim mnenjem, da so lastnosti lesa rdečih hrastov slabše kot lastnosti lesa belih hrastov. Rezultati raziskave bodo prispevali k boljšemu razumevanju variabilnosti lastnosti lesa in optimalnejši izbiri in uporabi hrastovine.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [R. Keše], 2016Language - slovenianCOBISS.SI-ID - 2627721
Author
Keše, Rok
Other authors
Merela, Maks |
Straže, Aleš
Topics
beljava |
jedrovina |
mehanske lastnosti |
hrastovina |
sapwood |
heartwood |
mechanical properties |
oak
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
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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Keše, Rok | |
Merela, Maks | 24676 |
Straže, Aleš | 18149 |
Source: Personal bibliographies
and: SICRIS
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