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Mechanical properties of sapwood versus heartwood, in three different oak species
Merela, Maks (Avtor), Čufar, Katarina (Avtor)

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Izvleček
The aim of this study was to investigate the main mechanical properties of sapwood and heartwood in white and red oaks. Samples of wood were taken from 26 oak beams prepared to be used for railway sleepers, of which 62 % were from white oak (either Quercus petraea or. Q. robur) and 38 % from red oak group, represented by Q. cerris. For both oak groups, the following parameters were determined: the density, bending strength, modulus of elasticity (MOE), compression strength and Brinell hardness of sapwood and heartwood. Multiple analyses were done to compare the properties of sapwood and heartwood, as well as the properties of white vs. red oaks. The results revealed no significant differences between sapwood and heartwood properties but statistically significant differences were found between the properties of white and red oaks. The research results contradict the common opinion of users that the mechanical properties of sapwood are inferior to those of heartwood. Investigations revealed that Q. cerris had even better mechanical properties than Q. robur or Q. petraea, which also contradicts the common opinion that its mechanical properties are inferior to those of white oaks. The results help to understand better wood variability for optimal selection of timber for construction.

Jezik:Angleški jezik
Ključne besede:Quercus, mehanske lastnosti, gostota, beljava, jedrovina
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:BF - Biotehniška fakulteta
Leto izida:2013
Založnik:Šumarski fakultet, Sveučilišta u Zagrebu: Hrvatsko šumarsko društvo
Št. strani:str. 323-334
Številčenje:Vol. 64, no. 4
UDK:630*812
ISSN pri članku:0012-6772
DOI:10.5552/drind.2013.1325 Povezava se odpre v novem oknu
COBISS.SI-ID:2172041 Povezava se odpre v novem oknu
Število ogledov:933
Število prenosov:284
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Naslov:Drvna industrija
Skrajšan naslov:Drv. ind.
Založnik:Šumarski fakultet Sveučilišta u Zagrebu, Hrvatsko šumarsko društvo, Croatiadrvo, d. d., Exportdrvo, p. o.
COBISS.SI-ID:2858754 Povezava se odpre v novem oknu

Sekundarni jezik

Jezik:Neznan jezik
Naslov:Density and mechanical properties of oak sapwood versus heartwood in three different oak species
Izvleček:
The aim of this study was to investigate the main mechanical properties of sapwood and heartwood in white and red oaks. Samples of wood were taken from 26 oak beams prepared to be used for railway sleepers, of which 62% were from white oak (either Quercus petraea or Q. robur) and 38% from red oak group, represented by Q. cerris. For both oak groups, the following parameters were determined: the density, bending strength, modulus of elasticity (MOE), compression strength and Brinell hardness of sapwood and heartwood. Multiple analyses were done to compare the properties of sapwood and heartwood, as well as the properties of white vs. red oaks. The results revealed no significant differences between sapwood and heartwood properties but statistically significant differences were found between the properties of white and red oaks. The research results contradict the common opinion of users that the mechanical properties of sapwood are inferior to those of heartwood. Investigations revealed that Q. cerris had even better mechanical properties than Q. robur or Q. petraea, which also contradicts the common opinion that its mechanical properties are inferior to those of white oaks. The results help to understand better wood variability for optimal selection of timber for constructions.


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