Compressed air conveys material through a hose at high velocity to the nozzle, where water is added. Material is consolidated on the receiving surface by the high-impact velocity. Fibers - Control cracking, increase toughness values and improve impact resistance and energy absorption. Accelerators - Improve placement characteristics in adverse conditions, allow for thicker single pass applications, increase production capabilities and reduce the occurrence of fallouts on structures subjected to vibration. This system consists of prefabricated panels of polystyrene insulation sandwiched between two parallel sheets of wire mesh, and sprayed with concrete on-site.
Incredible strength comes from the galvanized wire that pierces the insulation at acute angles.
It is welded to both sheets of wire mesh to create a truss-like support system of incredible strength. Panels are attached to the slab foundation on rebar dowels cast into the slab every two feet, so each panel is fixed to the slab at two points. Panels are easily cut, so snaking pipes and wires through the polystyrene is simple and fast. Shotcrete sandwich panels combine the durability of concrete with the insulating values of polystyrene. These walls can achieve R-values of anywhere from 7 to 33, depending on thickness of the core insulation and concrete layers.