$5 · perlite - insulation, light weight aggregate or soil amendment

4 cubic foot bags of perlite. It has been stored outside, so some of the bags are damaged. Perlite has excellent insulating characteristics and is extremely light weight, because of this Perlite is also 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 it completely fills all cores, and crevices. In addition to providing thermal insulation, perlite enhances fire ratings, reduces noise transmission and it is rot, vermin and termite resistant Perlite is also ideal for insulating low temperature and cryogenic vessels. When perlite is used as an aggregate in concrete, a lightweight, fire resistant, insulating concrete is produced that is ideal for roof decks and other applications. Perlite is not used for load-bearing concrete. Mixing perlite with concrete is a matter of proper portion; you must mix the correct ratio of perlite, cement and water. The more perlite in the mix, the higher the R value, but the lower the structural integrity of the cured concrete. Perlite can also be used as an aggregate in Portland cement and gypsum plasters for exterior applications and for the fire protection of beams and columns. Other construction applications include under-floor insulation, chimney linings, paint texturing, gypsum boards, ceiling tiles and roof insulation boards.