ANALYSIS OF PHYSICAL PROPERTIES OF GYPSUM PANELS FROM BANANA BOARD WASTE MATERIAL

<p><strong><em>Abstract. </em></strong><em>Research has been carried out which aims to determine the manufacture and physical properties of gypsum panels in the manufacture of gypsum panels for home interiors using banana midrib waste which is converted into fiber. Variations in the composition of mixing gypsum flour with banana midrib fiber include: Samples (A: 0%:100%) , (B: 2%:98%), (C: 4%:96%), (D: 6%:94 %), (E: 8%: 92%</em><em>)</em><em>, and (F: 10%: 90%) with a FAS of 0.5. The physical test parameters include: Density, Water absorption, and Thickness expansion. From the test results obtained gypsum panels that are The best is in sample B which has a density value = 1.19 g/cm</em><em>³</em><em>, water absorption value = 24%, a thickness expansion value = 2.53%, which has complied with SNI 01-4449-2006 on the ceiling board.</em><em></em></p><p><strong><em> </em></strong></p><p><strong><em>Key words:</em></strong><em> Gypsum panels, banana midrib, and gypsum flour.</em><em></em></p>

analysis of mechanical properties of ceiling boards based on corn cobs and coconut coir waste with latex adhesive

<p align="center"><strong><em>Abstract</em></strong></p><p>Ceiling evelopment by utilizing waste corn cobs, coconut coir with gypsum flour an the adition of latex adhesive. Variations in the composition of the mixture of corn cobs, coconut coir, gypsum flour with latex adhesive include sample A (0:0:100:15), sample B (3:3:94:15), sample C (6:6:88:15), sample D (9:9:82:15), sample E (12:12:76:15), and sample F (15:15:70:15) with emphasis using a <em>hot press </em>and drying for 28 days. The test parameters include flexural strength and fracture strength. The test results show that sample B in the composition (3:3:94:15) is the optimal result. In this composition, the resulting ceiling board has the characteristics of a flexural strength of 3966,39 kgf/cm² and a fracture strength of 1088,6 kgf/cm².</p><p><strong><em>Keyword :</em></strong><em> Lateks , Ceiling Board, Coconut Coir, Corn Cob</em></p><p><em> </em></p>

PHYSICAL PROPERTIES AND MICROSTRUCTURE OF PARTICLE BOARDS BASED ON PALM OIL PALM EMPTY FRUITS AND BAMBOO POWDER WITH A MIXED ADHESIVE OF GAMBIR AND UREA FORMALDEHYDE

This test was carried out to reduce waste in coconut empty fruit bunches and to determine the characteristics and microstructure of the particle board surface. The samples used consisted of bamboo powder and oil palm empty fruit bunches with gambier adhesive and urea formaldehyde with variations including: 10%:75%:15%:11%; 20%:65%:15%:11%, 30%:55%:15%:11%, 40%:45%:10%:11%. The particleboard was printed and pressurized using a hot press of 16kg/cm2 for 15 minutes at a temperature of 120 oC, with a drying time of 14 days. The test parameters include: density, moisture content, thickness expansion, and microstructural analysis using SEM (Scanning Electron Microscopy) which refers to SNI 03-2105-2006. The characterization of particleboard produced in the density test is 0.66-0.74 g/cm3, the water content value is 2.4-6.9%, the thickness expansion value is 7.2-12%. Based on the percentage value of the density of the resulting particleboard is a medium density particleboard.

Analysis Of The Mechanical Properties Of Brick With The Addition Of Cotton

<p align="center"><strong><em>Abstract</em></strong></p><p>It has been done making bricks with the addition of cotton.Variations in the mixture of cement, sand and cotton are sample A (30%:70% :0%), sample B (30%:69,5%:0,5%), sample C (30%:69%:1%), sample D (30%:68,5%:1,5%), Water Cement Factor of 0,5 and dry time one day. Characteristic of the tests carried out include: compressive strength and fracture strength.Analysis of the mechanical properties of the bricks produced in sample A with a compressive strength value = 28.81 kg/cm² and fracture strength value = 23.11kg/cm², sample B with acompressive strength value = 26.85 kg/cm² and fracture strength value = 22.32 kg/cm², sample C with a compressive strength value = 25.10 kg/cm² and fracture strength value = 15.09 kg/cm², sample D with a compressive strength of 17.14 kg/ cm² and a fracture strength value 15.51kg/cm². The bricks produced namely in sample B.</p><pre><strong><em>Keywords :</em></strong>Bricks, Cotton, and Cement</pre>