Document Type : Research Paper

Authors

• Haniye Shurvazi ¹
• Mohammad Shamsian ²
• Ali Bayatkashkoli ²
• Mohammad Dahmardeh Ghaleno ²

¹ Department of Wood and Paper Industries, Faculty of Natural Resources, Zabol University, Iran

² Faculty member of Zabul University - Department of Wood and Paper

Abstract

This study aims to investigate parallel strand lumber (PSL) made from reed waste and laminated veneer lumber (LVL) obtained from spruce wood with glass fiber reinforced polymer (FRP) and epoxy resin. The independent variable was FRP fibers in LVL and PSL and their comparison with the case of not using FRP. The mechanical properties of the manufactured boards include bending strength (MOR) and modulus of elasticity (MOE) in the width and edge of the test sample, shear strength, compressive strength parallel to the fibers, compressive strength perpendicular to the fibers, internal adhesion and screw holding strength as Dependent variables were investigated. The obtained results were analyzed in the form of completely randomized design by SPSS software. The results showed that in all the studied mechanical properties, the use of FRP strengthened the mechanical properties. For LVL, the MOR value for the width and edge of the test sample showed an increase of 93% and 59%, respectively. The value of MOE during strengthening with FRP showed an increase of 89.6 and 132% for the width and length of the PSL test samples, respectively. For LVL, the MOE value of the width and edge of the test sample increased by 54% and 95.5% after strengthening. Reinforcement of PSL test samples has improved their shear strength by 31%, while this value is only 2.5% for LVL. The vertical stress of fibers after strengthening with FRP for LVL and PSL has increased and its value is The order of 6.39 and 4.34 has increased. In the internal adhesion test, strengthening with FRP improved the internal adhesion strength of the samples by 92%. The retention strength of the screw was improved by 27% due to the strengthening of the test samples with FRP.

Keywords

• parallel strand lumber (PSL)
• laminated veneer lumber (LVL)
• polymer reinforced with glass fibers and epoxy resin (FRP)
• mechanical properties

Main Subjects

• Composite wood products