| Summary: | The increasing demand in construction products has been reducing the log
availability. Material that can be used as a substitute of logs is bamboo. Petung
bamboo shavings were processed into composite products such as cement board.
This study aimed to determine the effect of interaction between the type of
catalyst and particle size on cement board properties of petung bamboo.
This study used a completely randomized experimental design with two
factors, there were catalyst type factors (K1 : MgCl2 and K2 : CaCl2) and particle
size factors (U1 : passed 1 cm x 1 cm restrained 0.5 cm x 0.5 cm, U2 : passed 0.5
cm x 0.5 cm restrained 0.2 cm x 0.2 cm and U3 : passed 0.2 cm x 0.2 cm
restrained 0.1 cm x 0.1 cm). The result of variance analysis that showed a
significant different was tested with Tukey Honestly Significant Difference at
level 1 % and 5 %. The parameters tested of this study based on DIN 1101
standards, Bison (1975) and FAO (1996) standards, there were density, water
content, water absorption, thickness swelling, the reduction of thickness due to
pressure of 3 kg /cm2, modulus of rupture and modulus of elasticity.
The results showed that the interaction between the type of catalyst and the
particle size significantly affected the reduction of thickness due to pressure of 3
kg/cm2. CaCl2 and particle passed 0.2 cm x 0.2 cm restrained 0.1 cm x 0.1 cm
gave the lowest value of the thickness reduction is 3.01%. Type of catalyst factor
affected the modulus of elasticity. The value of modulus of elasticity in cement
board with CaCl2 higher than cement board with MgCl2. Particle size factor
affected in physical and mechanical properties of petung bamboo cement board.
Particle size factor, bigger to smaller, the value of density, modulus of rupture and
modulus of elasticity increased, in the other side the value of water content, water
absorption, thickness swelling and the reduction of thickness due to pressure of 3
kg/cm2 decreased. Compared to the standard, the average of water content has met
Bison (1975) standards, density has met DIN 1101 standards, water absorption
has met FAO (1996) standards, thickness swelling has met 33% of Bison (1975)
standards , the reduction of thickness due to pressure of 3 kg /cm2 has met DIN
1101 standards, modulus of rupture has met 33 % of DIN 1101 standards and has
met 83% of Bison (1975) standards, modulus of elasticity has met 67% of FAO
(1996) standards.
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