Effect of Rice Husk and Diatomite on the Insulating Properties of Kaolin - Clay Firebricks
Journal Title: Leonardo Electronic Journal of Practices and Technologies - Year 2007, Vol 6, Issue 11
Abstract
This work was carried out to investigate the effect of rice husk and diatomite on the insulating properties of kaolin-clay firebrick. Five firebrick samples of different compositions were fired at 900°C, 1000°C, 1100°C, and 1200°C. Samples A-E are all insulating firebricks that can withstand temperatures ranging from 900°C to 1200°C since none of the samples crumbled during firing. The results showed that they all had good insulating characteristics with their highly porous structure making them suitable for backup insulation. Mixing ratios of 3:2:4:1 representing weight in grams of kaolin, plastic clay, rice husk and diatomite respectively for sample D gave the optimum performance values in terms of modulus of rupture, apparent porosity, apparent density, bulk density, and thermal conductivity at all temperatures. At 1200°C, the values are 22.57kgf/cm[sup]2[/sup] for modulus of rupture, 98.25% for apparent porosity, 2.38g/cm[sup]3[/sup] for apparent density, 1.11g/cm[sup]3[/sup] for bulk density, and 0.038w/mK for thermal conductivity.
Authors and Affiliations
Emmanuel ONCHE, Benjamin UGHEOKE, Sunday LAWAL, Utibe DICKSON
Keywords
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