CENTRO EXPERIMENTAL DE LA VIVIENDA ECONOMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
PEANUT HUSKS AS RAW MATERIAL FOR CEMENTITIOUS COVERING PANELS
M. P. GATANI , G. H. D. TONOLI , Z. D. FREITAS , M. BATTISTI ,H. SAVASTANO JR.
Conferencia; Non-conventional Materials and Technologies (NOCMAT 2009); 2009
University of Bath
Peanut husks are residues from the processing of peanuts. In 2008, Argentina has been the major supplier to the global market of peanut, leader by the quality of the agricultural product. With 700,000 Tn/year of peanut in box produced, around 30% of this amount corresponds to the husks, and there are no profitable uses for this residue yet. Actually, part of them is burned to generate energy and used for animal feed. This paper presents the results of an experimental study using peanut husks as potential application on natural fibre composites for ceiling and wall covering panels. Natural fibre-reinforced cementitious composites are produced from the residue of the harvesting and processing of peanuts. Peanut husks were cut in particles bigger than 0.6 mm and used as aggregates in the cement matrix. Different sizes of peanut husks were evaluated. Ordinary Portland cement, ground carbonate material and the cut husks were mixed dry before the water addition. Composites were prepared using the slurry dewatering and pressing method. Varied sizes of peanut husks particles were used. Mix of them in cement based composite resulted with interesting aspect and physical and mechanical behaviour. A final 0.25 w/c ratio was obtained. The results at 7 days of cure showed an attractive combination of physical (bulk density, water absorption and apparent porosity) and flexural (limit of proportionality, modulus of rupture, modulus of elasticity and toughness) properties. The lightweight cement based composites presented modulus of rupture values of up to 8 N/mm2, bulk density around 1,900 kg/m3 and water absorption of up to 13.6% by mass. Further studies are in progress to determine other physical and mechanical properties and long term behaviour.