Abstract
The use of rice husk and corn cob ashes as aggregates for foundry moulding sand has been studied. 5-12.5 weight percent of rice husk and corn cob ashes were added to the sand mixture and the sand properties determined. A mixture of equal proportion of rice husk and corn cob ashes was also used. In each case, four weight percent water and clay were added to the sand mixture. Some of the properties of the sand tested are: permeability, green compression strength, dry compression strength, green shear strength, dry shear strength, moisture content and permeability. The results showed that the green compression strength, green shear strength, moisture content and permeability decrease with increase in the additives (rice husk ash, corn cob ash, and (50% rice husk and 50% corn cob ashes). While dry compression strength and dry shear strength increase with increase in weight percent of the additives.
Highlights
INTRODUCTIONThe urgent need to develop the foundry industries in Nigeria in order to meet the technological development of the country has led to so much interest in the characterization of the locally available materials
The urgent need to develop the foundry industries in Nigeria in order to meet the technological development of the country has led to so much interest in the characterization of the locally available materials.Silica sand is an extremely good material for making casting moulds because it has the ability to withstand the temperature of the molten metal
Better casting with better surface finished are expected to be made by blending this fine grains corn cob and rice husk ashes with silica sand
Summary
The urgent need to develop the foundry industries in Nigeria in order to meet the technological development of the country has led to so much interest in the characterization of the locally available materials. Silica sand is an extremely good material for making casting moulds because it has the ability to withstand the temperature of the molten metal. Rice husk and corn cob are waste by products of agricultural processing industries These materials constitute ecological problem and the need has arisen to reuse these materials for economically viable ventures. Better casting with better surface finished are expected to be made by blending this fine grains corn cob and rice husk ashes with silica sand. The use of these agricultural waste products will help the environmentalist in solving the pollution problem associated with the disposal of these materials
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call