Properties Of Ceiling Board Made Of Coffee Husk, Mango Seed Coat, And Sawdust

Abstract

In today’s world, the utilization of Agricultural waste materials has been of great interest and much attention. due to its many negative environmental consequences such as global warming during burning, offensive smells, and breeding ground for mosquito during accumulation. In Jimma Coffee husk, Mango seed coat and Sawdust are more available and could be beneficial in its usage as a ceiling board. This research was undertaken to determine the suitability of those waste as ceiling board, to determine the chemical composition of raw materials, to investigate the physical properties of the ceiling board, and comparing to standard requests. A Laboratory was conducted. A total of 120 specimens were prepared by processing the raw material that was collected, dried, ground with size a of 2.5mm, blended with 2.5g Urea-formaldehyde per liter according to 8 proportioned mix ratios placed in to the prepared plastic mold; lastly it compacted. The chemical composition values show that both the fiber and lignin content of sawdust was recorded 24.24%, 8.3% and 33.1%, 23.29% higher than Mango seed coat and Coffee husk, respectively. Likewise, Moisture content of Mango seed coat increment by 19.75%, 17.8% from Sawdust, and Coffee husk correspondingly. Again,the ash content of Coffee husk was 46.67%, 36.99% higher than mango seed coat, and sawdust. Similarly, the physical properties values which are water absorption values are between 4.9-20%, that was higher than 3% compared to standard, and that of thermal conductivity is between 0.0939-0.1935%W/mK that was less than 0.19W/mK compared to standard. Whereas, the flexural strength lied between 0.019-0.041N/mm2 that was less than 0.065 N/mm2 compared to standard. Likewise, the flaking test is between 3.58-6.06g although, the compressive strength values are 0.1mpa was recorded. Also, they have a better value in terms of thermal conductivity compared to standard requests by national building material test center. Therefore, it can be conclude that the agricultural by-product such as Coffee husk, Mango seed coat, and Sawdust could be used as raw materials for the ceiling board. Moreover, the community should give special attention to use it.