Cement board from juvenile Acacia Mangium

This research done to see the potential of Juvenile Acacia Mangium in producing cement board. The material ratio wood cement is 1: 2.5 and for the chemical additives we use Aluminum Sulphate (AI2(SO4)3) Sodium Silicate (Na2SiO3) with different percentage that is 0%, 1% and 3%. The particle sizes using 0.5 mm, 1.0mm and 2.0mm. The wood cement board was test to determine their strength properties. This testing technique that was is including bending testing, thickness swelling, internal bonding testing and water absorption. The results for bending testing are decrease from 2.0 mm to 0.5 mm even using the different percentages of Sodium Silicate (Na2SiO3) and the result for bending testing is increase from 2.0 mm to 0.5 mm at 1% of Na2SiO3 and liner result mean horizontal at 0% and 3% of Na2SiO3, For the water absorption result is increase from 2.0 mm to 0.5 mm at 0% and 3% of Na2SiO3 and decrease from 2.0 mm to 0.5 mm at 1% of Na2SiO3 and for the results of thickness swelling is decrease from 2.0 mm to 0.5 mm even using different percentages of Na2SiO3. From this testing, we know that the particle sizes with different percentages of chemical additives give different strength properties of the board.