UTILIZING FILLER POWDER POWDER AND WOOD POWDER WITH POLYSTYRENE MATRIX AS A BASIC MATERIAL FOR MAKING PLASTIC WOOD COMPOSITE BOARD
Wood sawdust and eggshells are very easy to get, wherein the eggshell contains CaCO3, it will be used as a filler in the manufacture of composite boards and polystyrene as a binder (matrix). By varying the ratio of sawdust and eggshell 0:50, 10:40, 20:30, 30:20, 40:10 and 50: 0 (gr), we expect to get a quality composite board. This research analyzes compressive strength, water absorption and density. In this research, the first thing to do is a treatment consisting of diminution, sifting. Then proceed with board making. For the strength of the composite board, a compressive test is performed. From the test it was found that the greatest compressive firmness is owned by the board with a filler ratio of 20:30 which is 94.564 kg / cm2, the highest water absorption value is obtained on the board with a filler ratio of 50: 0 that is 31.517% and the largest density value obtained on the board with a filler ratio of 20: 30 which is 1,231 gr / cm3.