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Characterization and valorization of secondary quality hardwood as structural material

Abstract : To improve the value of secondary quality hardwood, it is important to understand its wood properties and optimize its mechanical properties. The variability of some structural, physical and mechanical properties of wood from beech and oak trees issued from thinning was studied. Logs from these trees were rotary peeled in three different veneer thicknesses (2.1, 3, and 4.2 mm). Veneer quality was assessed by measuring the veneer knot proportion and checking properties. The mechanical properties of LVL (laminated veneer lumber) made from these veneers were measured using the static and dynamic method. Juvenile wood in both species is concentrated in a very small area near the pith thus there will be no or low part juvenile wood peeled. The wood mechanical and physical properties of both species were strongly influenced by the wood density. The 3 mm thick veneer provided the optimal mechanical properties for LVL for both species. Such mechanical properties are comparable to LVL made with other hardwood species. The internal veneer provided LVL with higher density, but lower mechanical properties as a result of its higher proportion of knots.
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Submitted on : Thursday, December 12, 2019 - 9:39:07 AM
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  • HAL Id : tel-02406344, version 1

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Citra Yanto Ciki Purba. Characterization and valorization of secondary quality hardwood as structural material. Vegetal Biology. AgroParisTech, 2019. English. ⟨NNT : 2019AGPT0002⟩. ⟨tel-02406344⟩

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