EXPERIMENTAL ANALYSIS OF CERAMIC REFRACTORY MATERIALS BEHAVIOR REINFORCED WITH STEEL FIBER AND SILICA RICE HULL
Alessandro da Silva Nunes1; Marco Antonio Durlo Tier1; Ederli Marangon1
1 Universidade Federal do Pampa
doi:10.20906/CPS/COB-2015-1302
Resumo
The objective of the present work is to develop a new refractory ceramic material, from the use of waste resulting from power generation from rice husk burning, by adjusting the ceramic mass with refractory clay, silica from rice husk and fiber steel. The methodology used in this research is essentially experimental, where were produced test samples with partial replacement of refractory clay by silica from rice husk, in percentages of 10%, 20% and 30%, by volume, and incorporating 1% by volume of steel fibers. The test bodies were molded and uniaxial pressed (20 MPa), dried for 14 days and finally burning at 1300ºC temperature. After burning, were determined physical, mechanical and thermal properties of material. The physical properties evaluated by apparent density, apparent porosity, water absorption and linear shrinkage. The mechanical properties evaluated by compressive test and three-point flexural test. The thermal properties evaluated by thermal shock resistance. The obtained results indicate that mixtures made of 10% and 20% silica have values of thermal shock resistance very similar, however, a mixture with 20% presented the best performance on the mechanical resistance, leading to consider that the ceramic with 20% silica obtained the best performance in general. The addition of this byproduct (silica from rice husk) in the ceramic matrix shows a high potential for application as raw materials for refractory industrial.
Palavras-chave: silica from rice husk; fiber steel; ceramic material