SCHUNDLER COMPANY CONSTRUCTION USES OF PERLITE AND VERMICULITE
...concrete, fireproofing, fire-proofing, fire protection, cementitious spray-on plaster, Mica Pellets, under floor insulation, cementitious, vermiculite concrete, mineral loose-fill insulation, vermiculite loose-fill insulation, perlite cryogenic insulation, aggregates-lightweight, lightweight-insulating concrete, fire-poof plaster, loose-fill... See #2.
Perlite Institute, Inc.
...applications, and industrial applications. Construction Applications Because of perlite's outstanding insulating characteristics and light weight, it is widely used as a loose-fill insulation in masonry construction. In this application, free-flowing perlite loose-fill masonry insulation is poured into the cavities of concrete block where... See #3.
Young Block Company
...rating in Item 6 (below) and having a thickness of not less than 7 5/8 inches is four hours when cores which are not grouted are filled with silicone-treated perlite loose-fill insulation; vermiculite loose-fill insulation; or expanded clay, shale or slate lightweight aggregate, sand or slag having a maximum particle size of 3/8 inches. See #4.
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