Insulated concrete form
Rastra panels are large building blocks with a grid of internal channels that serve as a stay-in-place wall form for residential and commercial structures. Once a complete floor is set in place, the channels are reinforced and concrete is poured to achieve any desired strength. A Rastra wall is capable of withstanding earthquakes, hurricanes, and other forces of nature, because the system of channels is designed to provide maximum strength with minimum amount of concrete.
The Rastra panels are made of recycled post-consumer foam plastics placed in a cement matrix. This composition unifies the best properties for a wall; it is durable, lightweight, and quick to install, and also provides high thermal and acoustic insulation. Rastra is resistant to fire, mold, insects, and rodents. It also has a cementitious surface to which stucco adheres well.
Contact: Rastra Corporation, Scottsdale, Arizona, USA.
For more information, see Transmaterial: A Catalog of Materials That Redefine our Physical Environment