Thermal analysis of cement panels with lignocellulosic materials for building
¹Federal University of Lavras, Department of Agricultural Engineering, Campus Universitário, PO Box 3037, Lavras, Minas Gerais, Brazil
²Federal University of Lavras, Department of Engineering, Campus Universitário, PO Box 3037, Lavras, Minas Gerais, Brazil
³Federal University of Lavras, Department of Forest Sciences, Campus Universitário, PO Box 3037, Lavras, Minas Gerais, Brazil
⁴Universidad Nacional de Colombia, Sede Medellin, Faculty of Agrarians Science, Medellín, Colombia
⁵University of Firenze, Department of Agriculture, Food, Environment and Forestry (DAGRI), Via San Bonaventura 13, IT50145 Firenze, Italy
*Correspondence: patricia.ponciano@ufla.br
Abstract:
The use of lignocellulosic material residue in cement composites can be considered as a good option because they allow good thermal behaviour. This paper aimed to compare three kinds of cement panels reinforced with different lignocellulosic materials (Coffee husk, Coconut shell, and Banana pseudostem) based on their thermal properties. To produce each panel, the methodology suggested by Souza (1994) was used. Six replicates of each lignocellulosic panel with dimensions of 7.0×7.5 were evaluated. The thermal analysis was performed in a chamber composed of MDP (medium density particleboard). The chamber contained the heat source (incandescent lamp) connected to a thermostat that maintained the temperature at 48.0 °C. The porosity and thickness of the panels and the thermal behaviour of each sample panel (thermal conductivity, resistivity, resistance, and transmittance) and the difference in temperature of both sides of the panel were evaluated. The temperature difference to stabilization was obtained after a sampling time of 200 minutes, with 1,000 readings of 12 s each. Although all the panels were submitted under the same temperature, the inner and external superficial temperatures of the coffee husk panels reached smaller values. Besides, coconut and banana pseudostem panels presented the best results of thermal transmittance and thermal resistance. Thus, coconut shell panels present the best thermal performance, which means that this panel might be an attractive alternative building material, in terms of heat insulation for indoor applications.
Key words:
alternative building material, and banana pseudostem, coconut shell, coffee husk, conductivity, thermal cameras, thermal transmittance