COMPATIBILITY OF FOUR TROPICAL WOOD SPECIES AND SAGO STEM TO CEMENT AND PROPERTIES OF MANGIUM CEMENT BONDED PARTICLEBOARD
Main Article Content
Abstract
The quality of the cement board depends on the compatibility between cement and particles from
lignocellulosic biomass. The purpose of this study was to determine the compatibility between cement
and particles from four tropical wood namely mangium (Acacia mangium Willd), teak (Tectona grandis
Linn. F.), gelam (Melaleuca leucadendron (L.), dadap (Erythrina variegata L.), and sago stem (Metroxylon
sago Rottb.), and to determine the physical and mechanical properties of the mangium cement board
produced by adding magnesium chloride (MgCl2
) as an accelerator. This research was conducted in
two steps. The first step consisted of measuring the hydration temperature of a mixture of cement
with particles from the four wood species and sago stems by adding magnesium chloride (MgCl2
),
with variations of 0%, 2.5%, 5%, and 7.5% based on the cement weight. Two types of mixtures
from the first step were then used in the second step, namely the manufacture of cement board. The
cement board was made using a weight ratio of mangium particles:cement:water of 1:2.7:1.35. The
board is made with a target density of 1.2 g/cm3
. Physical and mechanical testing refers to the ISO
8335-1987 standard. The results of the hydration temperature showed that all of the mixtures were
classified into “low inhibition”, except for mixture between cement and mangium particles without
a catalyst which was included in the classification of “moderate inhibition”. While the results of
cement board tests indicate that the cement boards made from mangium wood particles with 5%
MgCl2
addition had better properties compared to mangium cement boards without catalysts.
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