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Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
waste copper slag in the mix. In a “loose” state the sand-copper
slag mix shows friction angles of 30.4° – 31.4°, which is a
deviation of only 1°, even when the percentage by weight of
waste copper slag changes from 0 to 40.
The stiffness of the sand was found to be clearly improved
by the addition of waster copper slag. The addition of waste
copper slag substantially reduced the settlement of the mix
when tested in a conventional consolidation apparatus. This
shows potential of waste copper slag to be successfully used as
a replacement for sand in “sand piles” with the added advantage
of improved performance.
It was puzzling to find that the stiffness of the sand-copper
slag mix was insensitive to increases in the amount of waste
copper slag beyond 10% by weight. However, the authors feel
that shear strength and stiffness behavior holds the greatest
potential for the use of waste copper slag hence, further testing
is already underway.
7 ACKNOWLEDGEMENTS
Officials of Colombo Dockyard for providing waste copper slag
for this research.
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