Pengujian Kuat Lentur Laminasi Balok Dengan Pemanfaatan Limbah Kulit Kayu Sagu Sebagai Balok Dengan Penambahan Pasak Menggunakan Paku

Sago bark waste is an abundant organic byproduct in Meranti Islands Regency,Riau Province, which remains underutilized. This study aims to utilize this waste as a raw material for laminated beams and to examine the physical and mechanical properties of the resulting laminated products. The experimental method involved three types of laminated beam specimens: without dowels, with dowels spaced at 15 cm, and with dowels spaced at 10 cm. The adhesive used was FOX glue, a PVAc-based adhesive. Tests were conducted on moisture content, specific gravity, as well as mechanical properties including flexural strength (Modulus of Rupture/MoR and Modulus of Elasticity/MoE), tensile strength, compressive strength, and shear strength. The results showed that the highest MoR was obtained from the 10 cm dowel specimens, with a value of 42.93 MPa, followed by 15 cm dowel specimens
at 35.27 MPa, and non-doweled specimens at 26.32 MPa. Similarly, the highest MoE was also recorded for the 10 cm dowel specimens at 6892.20 MPa, compared to 5234.88 MPa for 15 cm dowels and 4161.04 MPa for specimens without dowels.
Overall, laminated sago bark beams with 10 cm dowel spacing exhibited the best mechanical performance and fall under Strength Class III based on SNI 7973:2013 standards. These findings suggest that sago bark waste has significant potential as an environmentally friendly alternative material for lightweight and non-structural construction applications. This research contributes to waste reduction efforts and supports the enhancement of local material value through engineered wood innovation.