Study of thermal conductivity of light concrete based on rice husks

Abstract

Rice production generates waste after decortications. These rice husks which, if they are not used for energy, they provide a space for the environment and therefore can be used in the manufacture of composite materials. This study deals with the determination of the thermal conductivity of composite cement-rice husk, rice husk-sand-cement and sand-cement method ‘’ comparison’’ based on the principle of guarded hot plate. Composites studied exhibit the following physical characteristics: composite 1, rice husk cement, has a density of 901.17 ± 30.11kg/m3, a poros ity of 31.22 ±0.25% and a thermal c onductivity of 0.638 ± 0.061 W / m K, while the c ompos ite 2, sand-cement has a density of 2220.00± 73.33kg/m3, a porosity of 8.61 ± 0.22% and a conductivity Thermal 1.30± 0.27 W / m K. In view of the results, rice husk composites have better thermal performance because we have a reduction of the thermal conductivity of about 50% compared to the sand-cement composite.