The Effect of Wood Species and Strip Width on Bending Strength and Modulus of Elasticity in End-Grain Core Blockboard

Abstract

It is aimed to compare the bending strength and modulus of elasticity of end-grain (vertical strip) core blockboard, unlike the usual (lengthwise strip core) blockboard construction, with that of the traditional blockboard with the face-grain or edge-grain core construction. Oriental beech and black poplar woods are provided by taking care to avoid the grain irregularities and visible defects are used in the study. These timbers are used to obtain the core, top and bottom layers of the blockboard. PVAc mounting glue is used for bonding the layers together. According to the test data: The bending strength and modulus of elasticity of oriental beech blockboard are 39% and 26% higher respectively than that of end-grain core black poplar blockboards. If we evaluated by neglecting wood species, strip width was an effective factor in the bending strength and ineffective modulus of elasticity. In addition, the bending strength of the end-grain core oriental beech blockboard is 79 MPa and that of the end-grain core black poplar blockboard is 57 MPa, regardless of the width of the core strip. When these values are compared with the values of other engineered wood, the result is considered open to improvement and satisfactory.

Keywords

• Blockboard
• Core Structure
• Wooden Board
• Bending Strength
• Modulus of Elasticity

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