Testing of Biomass Ash from Cashew Nut Shell Waste as a Thermal Insulator

The aim of this research is to determine the thermal insulation efficiency of cashew nut shell (CNS) ash with a mixture of 1:0.25 (tile nut am-53) and 1:0.25 (tile nut am-53):0.25 (sago). The method used in this research is the experimental method. Research resaeach Heater element capacity is 396 W/m 2 .°C, resulting in a thermal conductivity of 0.89 watts/m.°C and 106.58 Watt for conduction heat for sample I; and thermal conductivity 0.150 watts/m.°C and 92.16 Watt for conduction heat for sample II. Where the material in Sample I (mixture of cashew shell ash, Tile Grout AM53, and sago with a composition of 1: 0.5: 0.5) is able to insulate heat by 73% and Sample II (mixture of cashew shell ash, Tile Grout AM53, and sago with a composition of 1:0.5:1) by 76.72%.