Vol. 4, Issue 1 (2017)
An assessment of the binding capacity of bentonite and ukpor clay on the foundry properties of river Niger, Onitsha beach sand
Author(s): Agbo AO, Anene FA, Nnuka EE
Abstract: This study assessed the binding efficacy of bentonite and Ukpor clay on the foundry properties of sand obtained from the River Niger Onitsha beach. Chemical analysis was conducted using the x-ray fluorescence technique. Sieve analysis was conducted using electric sieve shaker. The mechanical properties of the moulding sand were tested using standard techniques (AFS). The mechanical properties tested were green compressive strengths, green shear strength, dry compressive strengths, dry shear strength, permeability and fusion point. Result of the test obtained include: compressive strength (28KN/m2, 23.48 KN/m2), dry compressive strength (217 KN/m2, 215 KN/m2), permeability (146.64 No 148.451No) for bentonite and Ukpor clay respectively with fusion point (13900C) and AFS grain fineness number (81.81) of River Niger Onitsha beach sand. From the result it was found that 5% of Ukpor clay and 5% of bentonite respectively and then 4% water were most suitable for moulding river Niger Onitsha beach sand for application in non-ferrous foundry. Therefore, Ukpr clay is an excellent candidate to replace bentonite in mould production in the non-ferrous foundry.