mechanical properties of light weight sandwich panel made of sawdust and waste rubber

In this research, urea melamine formaldehyde resin with the different ratio (90:10, 80”20 and 70:30) of sawdust and rubber waste with the ratio (100:0, 90:10, 80:20) and press temperature (160, 170 and 180 oC) sandwich panels was made. Populous layers with 2 mm thickness also were pressed on the surface of the panels. Flexural strength, modulus of elasticity, internal bonding and compression parallel to the grain tests were used in accordance with the ASTM standard C393, D1037 and C364, respectively. The results of the mechanical tests were analyzed by analysis of variance and averages of groups with Duncan's multiple range test with 95% confidence level. The results showed that the temperature of 170 ° C was the best temperature in terms of mechanical properties of sandwich panels. Addition of 30% melamine formaldehyde resin increased the mechanical properties. Increasing the rubber up to 10% resulted in a maximum increase in compressive strength, flexural strength and internal bonding, and the samples without rubber increased the maximum elasticity modulus.