This research aims to study the using oil palm fiber to develop ceiling board product. The mixture ratios of Gypsum plaster: oil palm fiber: tap water: catalyst are 1 : 0.15 : 1: 0.03 1 : 0.20 : 1: 0.03 1 : 0.25 : 1: 0.03 1 : 0.30: 1: 0.03 and 1 : 0.35 : 1: 0.03 by weight. The ceiling board samples are cast in 30 x 30 x 1 centimeter in dimension. The ceiling board sample testing follows the TIS 219-2552. The results show that the longitudinal and lateral breaking load Nail pull resistance density and thermal conductivity of ceiling board with high quantity of oil palm fiber are lower than ceiling board with low quantity of oil palm fiber while that the deflection and water absorption of ceiling board with high quantity of oil palm fiber are higher. However all of oil palm fiber samples with lower than 0.2 of ratio can pass the standard.

This research aims to study the using oil palm fiber to develop pseudo-plywood from polyethylene product. The mixture ratios of oil palm fiber : polyethylene are 50 : 50 55 : 45 60 : 40 65 : 35 and 70 : 30 by weight. The pseudo-plywood samples are cast in 30 x 30 x 1.5 centimeter in dimension. The pseudo-plywood sample testing follows the TIS 966-2547. The results show that the density bending strength modulus of elasticity thermal conductivity and tension perpendicular to surface of pseudo-plywood with high quantity of oil palm fiber are lower than pseudo-plywood with low quantity of oil palm fiber while that the water absorption and swelling by density of pseudo-plywood with high quantity of oil palm fiber are higher. However all of oil palm fiber samples with lower than 65 of ratio can pass the standard.

This research aims to study the using oil palm fiber to develop cement-bonded fiberboard product. The mixture ratios of Portland cement type1: fine sand: oil palm fiber:tap water: catalyst are 1 : 1.95 : 0.05 : 0.40 : 0.03 1 : 1.94 : 0.06 : 0.40 : 0.03 1 : 1.93 : 0.07 : 0.40 : 0.03 1 : 1.92 : 0.08 : 0.40 : 0.03 and 1 : 1.91 : 0.09 : 0.40 : 0.03 by weight. The cement-bonded fiberboard samples are cast in 30 x 30 x 1.5 centimeter in dimension. The cement-bonded fiberboard sample testing follows the TIS 878-2537. The results show that the density thermal conductivity bending strength modulus of elasticity and tension perpendicular to surface of cement-bonded fiberboard with high quantity of oil palm fiber are lower than cement-bonded fiberboard with low quantity of oil palm fiber while that the water absorption and swelling in water of cement-bonded fiberboard with high quantity of oil palm fiber are higher. However all of oil palm fiber samples with lower than 0.06 of ratio can pass the standard.

This research aims to study the using basalt rock fragments to develop as interlocking block product. The mixture ratios of Portland cement type1: basalt rock fragments are 11 : 6 1 : 6.5 1 : 7 1 : 7.5 and 1 : 8 by weight and water per cement ratio was 0.6 by weight. The interlocking block samples are cast in 10 x 20 x 10 cubic centimeter of dimension with manual compression molding machine. The interlocking block samples were tested in accordance with TCPS 602-2547 standard which subjected for the interlocking block. The results show that the weight compressive strength and thermal conductivity of interlocking blocks with high quantity of basalt rock fragments are lower than interlocking blocks with low quantity of basalt rock fragments while that the water absorption of interlocking blocks with high quantity of basalt rock fragments are higher. From this research the medium and small enterprises could choose the proper ration for the interlocking block production mixing basalt rock fragments as per requirement.

This research aims to develop the natural-rubber floor tiles mixed with high fineness ethylene vinyl acetate plastic wastes (EVA plastics) from the factories. The study use natural-rubber STR 20 at 100 phr with various contents of EVA plastics (e.g. 0 5 10 20 40 and 80 phr) and then mixed with chemical substance at constant ratio include zinc oxide at 5 phr stearic acid at 2 phr mercaptobenzothiazole at 0.5 phr diphenyl guanidine at 0.2 phr and sulfur at 3 phr. The samples are ground by two-roll mill and formed by compression molding at 150 degree Celsius with 30x30x0.2 cm of dimension. The properties of the natural-rubber floor tiles are tested under ASTM standard. From the results it is found that the natural-rubber floor tiles mixed with 10 phr of EVA plastics is the suitable ratio for using as the rubber floor tiles in building. This ratio can increase the hardness tensile strength and wear resistant properties and decrease the density and thermal insulation properties when compare to the natural-rubber floor tiles without EVA plastic.