Effect of Gezawa Clay on the Properties of Silica Stone for Refractory Brick

Abstract:

The investigations centered on how addition of Gezawa clay (GC) affects the refractory properties of the Gezawa stone (GS) (Silica Stone) with a view to finding the optimum percentage of the blend that will give good refractory properties. The samples were crushed, ground, sieved and the chemical compositions were determined. Test samples were produced by blending the Gezawa stone with various proportions of Gezawa clay. The refractoriness of the samples was measured, and the samples were then fired to 1100and standard properties such as thermal shock resistance, cold crushing strength and apparent porosity were determined. The result shows that addition of Gezawa clay to Gezawa stone improves its thermal shock resistance but reduces the refractoriness, while the porosity was found to be within the specified range for fire clay and the cold crushing strength of the samples was high. Compromise could be made in selecting the percentage that would suit certain application.

• Periodical: Applied Mechanics and Materials (Volume 315)
• Pages: 11-14
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.315.11
• Online since: April 2013
• Authors: I.A. Rafukka, B. Onyekpe, Y. Tijjani
• Keywords: Apparent Porosity, Cold Crushing Strength, Gezawa Clay, Refractoriness, Silica Stone, Thermal Shock Resistance

References

[1] Chesti, A.R., (1986): Refractories Manufactures, Properties and Applications, Prentice-Hall of India, Private Limited, New Delhi Pp. 1-25, Pp. 75-97.

[2] Chester, J.H., (1973): Refractories Production and Properties, The Iron and Steel Institute, London Pp. 3-13, 295-315, 492-510.

[3] Onyekpe B., (2002): The Essential of Metallurgy and Materials in Engineering, AMBIK Press, Nigeria, Pp26.

[4] Hassan S.B., (2005): Modern Refractories, Production, Properties, Testing and Applications, Pp 1-13, Pp 28-45.