lightweight aggregate

lightweight aggregate

[′līt‚wāt ′ag·rə·gət] (materials) A lightweight inert material, such as foamed slag, vermiculite, clinker, and perlite, used in unreinforced concrete for making structures of low weight and high insulation.

lightweight aggregate

Aggregate of low-bulk specific gravity, such as expanded or sintered clay, foamed slag, fly ash, exfoliated vermiculite; used as an ingredient in lightweight concrete.