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Presentation - Third International Slag Valorisation Symposium

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Schematic microstructure 1<br />

Ideal lightweight aggregate<br />

� Strong core with uniform voids<br />

� Dense surface coating<br />

� Rough surface<br />

� Approximately spherical<br />

� 6 - 10 mm diameter<br />

� CaO rich surface coating<br />

� Black core due to reducing conditions<br />

49<br />

Second <strong>International</strong> <strong>Slag</strong> <strong>Valorisation</strong> <strong>Symposium</strong> │ Cheeseman, Imperial College London

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