Characterization of Peanut Shells for Their Valorization in Earth Brick

Peanut\r\nshells from Burkina Faso were characterized using mineralogical,\r\nmicrostructural and chemical methods to perform its possibility to be used as\r\nreinforce in adobe bricks. It consists of cellulose (48 wt%), hemicellulose (3 wt%) and lignin (28 wt%). The\r\npeanut shells were characterized by high porosity and showed water absorption around\r\n198% at 72 hours. Its chemical composition is essentially composed of silica,\r\niron oxides, alumina and calcium oxide. Its microstructure showed that the\r\npeanut shells were a compilation of microfibers with high porous of borders. In\r\nwatery solution, the peanut shells released polyphenols. Thermal conductivity\r\nof peanut at 25 °C was 0.155 ± 0.021 W/mK.\r\nThe physico-chemical characteristics of peanut shells were similar to those\r\nfound with agricultural by-products used in adobe reinforce.