THERMAL INSULATION BOARD FROM RICE HUSK AND SAWDUST USING NATURAL RUBBER LATEX AS BINDER
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Abstract
Due to global warming problem, thermal insulation materials are used as one of the most energy efficiency improvement in building and means of energy conversation in building. However, their production involves the use of synthetic fabrics and production of formaldehyde-based adhesives, with the consequent impact on the environment and health. To confront these major problems, this research uses rice husk and sawdust, an agricultural waste, as raw material for the production of thermal insulation boards bonded with natural rubber latex. For the production of the boards, rice husk : sawdust ratios of 1:0, 0:1, 1:1, 1:2, and 2:1 were mixed with 125%, 100% and 75% natural rubber. The boards were produced by hot press method at temperature of 120 ºC for 15 minutes in hydraulic press machine. Density and water absorption (WA), were evaluated based on Japanese Industrial Standard (JIS A5905). Mechanical properties ie., modulus of elasticity and Internal bonding were tested for strength of boards. The results showed that the density ranged from 672.86 to 889.31 kg/m3, WA ranged from 11.913 to 53.335% after 2 and 24 h immersion. Additionally, the thermal insulation boards had fairly low thermal conductivity, ranging from 0.096–0.105 W/m.K. As an environmentally friendly and renewable material, this thermal insulation material is of interest for energy saving purposes when it is used as building insulation material for walls or ceilings.
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References
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