Talk:Construction aggregate

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Would it hurt someone to put a definition in here? You have what the materials are, what they are used in, that is is needed in all modern construction, but not what an aggregate does. At least, it could be stated better.

The USGS has information and statistics on the specialty lightweight aggregates: clay, perlite, pumice, and vermiculite. Bmhtayl 00:15, 4 September 2007 (UTC)