A COMPARATIVE STUDY ON SOME MECHANICAL PROPERTIES OF STRUCTURAL COMPOSITE LUMBERS (SCL) PRODUCED FROM POPLAR (Populus Tremula L.) PAPELS

In this study, it was aimed to determine some mechanical properties of Laminated Veneer Lumber (LVL), Parallel Strand Lumber (PSL) and Laminated Strand Lumber (LSL), which are called structural composite lumbers (SCL). For this purpose, SCLs were produced from poplar (Populus tremula L.) strands. In the tests, modulus of rupture (MOR) and modulus of elasticity (MOE) according to TS EN 310, compression strength parallel to grain according to TS 2595, dynamic bending (shock) strength in accordance with TS 2477, tensile strength parallel to surface and perpendicular to surface according to procedure of ASTM D 1037-06a were determined. The differences of MOR, compression strength and dynamic bending strength values were statistically significant. Better mechanical properties were obtained in LVL samples. These results showed that the usage of PSL and LSL can be an alternative to LVL in furniture production and building sector. But especially in load bearing application, the usage of LVL was advised for not only its better mechanical properties, but also its easier manufacturing process. Although manufacturing process of LSL or PSL is more complex, the possibility of usage of waste of veneer industry makes them a cost-effective alternative to LVL and solid timber.

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