November 2002

Volume 54    Issue 11

Production of lightweight aggregate from waste materials

Mining Engineering , 2002, Vol. 54, No. 11, pp. 22-26
Weinecke, M.H.; Faulkner, B.P.

Why make LWA? Conventional lightweight aggregate is made by heating clay or shale in a rotary kiln to a temperature that causes the material to expand or bloat. This process has been commercial since the early 1900s. Lightweight aggregate is not only used because of its lighter weight but also because of its superior sound-abatement, fire-resistance, insulation and geotechnical properties.

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