SEKAM PADI DAN BATANG BAMBU SEBAGAI BAHAN BALOK KOMPOSIT DENGAN MENGGUNAKAN MATRIKS RESIN POLYESTER

Abstract

Abstract

Rice husks are often used less than optimally causing a lot of rice husks to have less use value, to increase use value and increase economic value, rice husk composite beams were created. In the rice husk component there is a lignocellulosic material which causes the growth of strong and rigid properties, from these strong and rigid properties the reason for rice husk as a composite beam material. This study aims to determine the value of density, Modulus of Rupture, and Modulus of Elasticity of rice husk composite beams.

                This test uses a rice husk composite beam measuring 5 cm thick, 5 cm wide and 76 cm long, referring to SNI 03-3959-1995 with additional bamboo slats as reinforcement and polyester resin as a binder. The test was carried out at the Structure Laboratory of the Civil Engineering Department, Faculty of Engineering, Tidar University, Magelang. Flexural strength testing refers to SNI 03-3972-1995 using a universal testing machine.

                The results of testing the flexural strength of the rice husk composite beam obtained the MOR value for the P1 variant, 15,313 MPa, for the P2 variant, 21,073 MPa, and 29,741 MPa for the P3 variant. For the MOE value obtained for variant P1 obtained 37,858 MPa for variant P2 obtained 56,185 MPa and for variant P3 obtained 82,033 MPa. The highest MOR and MOE values were obtained on the test object P3 with values of 29,741 MPa and 82,033 MPa.