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Abstract

Moulding properties of Isasa River Sand bonded with Ipetumodu clay (Ife-North Local Government Area, Osun State, Nigeria) were

investigated. American Foundry men Society (AFS) standard cylindrical specimens 50mm diameter and 50mm in height were prepared

from various sand and clay ratios (between 18% and 32%) with 15% water content. The stress-strain curves were generated from a

universal strength testing machine. A flow factor was calculated from the inclination of the falling slope beyond the maximum

compressive strength. The result shows that the flowability of the samples increases from 18% to 26% clay content, its maximum value

was attained at 26% and then it decreases from 30% to 32% clay content. The green compressive strength, dry compressive strength and

air permeability values obtained from the mould samples were in accordance with standard values used in foundry practice. The x-ray

diffraction test shows that the sand contains silicon oxide (SiO2), Aluminium oxide (Al2O3), and Aluminium silicate (Al6Si2O13). The

mould samples were heated to a temperature of 1200 o

C to determine the sintering temperature; fussion did not take place at this

temperature. The results showed that the sand and clay mixture can be used to cast ferrous and non-ferrous alloys.

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Authors and Affiliations

A.O. Oke
B.V. Omidiji

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