Properties of acacia mangium wcb in relation to particle size and additives (Na2Si03) / Mohamad Alif Aizat Mohd Azhar …[et al.]

Particle size and additives (Na2SiO3) had significance effect on physical and mechanical properties of wood cement board (WCB). One way analysis of variance (ANOVA) has been used to examine any significance differences between the populations mean. The findings revolved around the mechanical and physical properties of WCB from Acacia mangium. The two parameters involved in this study are the particle sizes and the additives (Na2SiO3). Particle size, additives (Na1SiO3) and the correlation between particle size and additives (Na2SiO3) have influence on all the WCB properties. The values of physical properties for particle size effect all met the standards of MS544:2001 except for particle size 2.0 mm of 0% Na2SiO3 and 1.5% Na2SiO3. In this instance the water absorption (WA) did not met the standards of MS544:2001. Effect of particle size on mechanical properties indicate fluctuation due to the decreasing of particle sizes while the effect of particle size on physical properties also show fluctuation due to the decreasing of particle sizes. Meanwhile 3% of Na2SiO3 cause higher values of modulus of rupture (MOR) (13.6 MPa), modulus of elasticity (MOE) (5,979 MPa) and internal bond (IB) (1.56 MPa). For the effect of additives (Na2SiO3) on physical properties, the value of WA and thickness swelling (TS) tends to decrease corresponding to the percentage (3%) of Na2SiO3.