Concrete Block Insulation Perlite

For instance the change in r value on a 12 block manufactured with 80 pcf concrete from insulating the cores with 5 pcf perlite in comparison with 7 pcf is less than 2.

Concrete block insulation perlite. Gulf perlite pcbs provide excellent thermal insulation and structural support against static and dynamic loads. Underwriters laboratories design no. Perlite concrete offers many advantages beyond its light weight. And in a variety of specialty applications including fireproofing sprays chimney fills interstitial floors acoustical sprays etc.

Perlite is a class a class 1 building material. Perlite insulating concrete consists of an appropriate mixture of portland cement perlite aggregate and water. Ul designs u901 u904 and u907 also achieve 4 hour fire ratings. Perlite plays an important role in a wide variety of construction related uses including.

Research suggests that more than 50 percent of expanded perlite worldwide is used by the construction industry. This is in comparison to sand and gravel concrete which weighs 140 to 150 pounds per cubic foot and the 60 to 120 pounds per cubic foot weight of expanded slag shale or clay. Perlite lightweight concrete is used in many different applications. Its weight can be varied in the range of 20 to 50 pounds per cubic foot depending on the mix design selected.

As an aggregate in lightweight insulating concrete and plaster. Perlite as a construction filler. Expanded perlite s high insulating qualities light weight and versatility make it an essential part of the construction industry for loose fill insulation and lightweight insulating concrete. It is ideal for use under concrete slabs in chimneys and in high temperature applications such as pizza ovens and rocket stoves.

Any change in the resistance of an insulated block as a function of perlite differing densities is small generally less than 5. It is the ideal construction aggregate filler for masonry fill insulation roof decks floor systems and other significant areas that need insulation. Perlite insulation is an inorganic product that does not support combustion or rot nor does it provide a habitat for rodents. U905 shows that a 2 hour rated 8 10 or 12 inch 20 25 or 30 cm concrete block wall is improved to four hours when cores are filled with perlite.

Depending on the density of the blocks an 8 inch thick block wall without any other type of insulation has a thermal resistance value between r 1 9 and r 2 5. 4 hour fire ratings.