Behaviour Of Compression Properties Of Small Clear Laminated Acacia Hybrid Species In Sarawak

Timber is one of the oldest and most well-known structural materials and one of the few natural resources that are renewable. Acacia hybrid which is produced from natural crossing between two parental timber species (Acacia auriculiformis and Acacia mangium) which it has desirable characteristics of fast growth rates and increased heart rot resistance in Sarawak. This species is used in researches for engineering purposes. Thus laminated Acacia hybrid of combine ages 7 with 10, 7 with 13 and 10 with 13 is used in these study to determine and compare the behavior of compression properties at different laminated. The demand of using timber as structural timber almost no existence in Malaysia. Knowledge and practices of timber in construction design still lacking among the engineers and architects. 30 pieces laminated specimens of Acacia hybrid being used in this testing procedure. This testing is to determine the physical and mechanical properties. These engineering properties were acquired from the rupture modulus, elasticity modulus, impact bending and compressive strength test (parallel and grain perpendicular). In the meantime, moisture content and density are assessed for physical properties. According to British Standard BS373.1957, the laminated were prepared at air-dry conditions. Thus, the result of this investigation is very useful for utilization in furniture and engineering construction industries in our country. From the findings, for 10 years old Acacia hybrid that the mean value for work done to break the specimens is 24 Joules and the mean value for compressive stress is 60.28 N/mm2. Meanwhile the basic density for 10 years old Acacia hybrid is 0.6780g/cm3. For the engineering utilization, the suitable age group for Acacia hybrid is 10 years old due to its have higher strength properties and highest density compare to 7 years and 13 years old