Study of the Physical and Mechanical Properties of Composite Boards Made of a Mixture of Poplar Chips and Recycled Tires

Document Type : Original Articles


1 Department of Wood Industires, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University

2 Department of Wood and Paper, Faculty of Nutral Resource Tarbiat Modarres University


The present study focused on the possibility of using recycled tires in the production of composite boards. Variables included: Mixing ratio of rubber particles and wood chips at four levels, namely 0, 25, 50, and 75 percent (based on the weight of dry wood); resin content at three levels, namely 3, 4, and 5 percent; and density at two levels, namely 0.55 and 0.75 gr/cm3. In total, 24 different treatments of bending strength, modulus of elasticity (MOE), and shear strength were examined according to DIN standards as well as impact strength in compliance with ASTM standard. The treatments were then compared with the control samples. Results showed that mixing ratio of rubber chips influences the mechanical and physical properties of the composite board produced. The increase in rubber chips content decreased bending strength, MOE, and shear strength; but it increased the specific gravity, MOR, MOE, and shear strength. Maximum MOR, MOE, and shear strength were at the mixing ratio of %25 rubber chips, using % 5 resin, and having 0.75 gr/cm3 specific gravity. Maximum impact strength was at the mixing ratio containing 50 percent rubber chips, using a 5 % resin and having 0.75 gr/cm3 specific gravity.