More and more polystyrene concrete are being used in construction as a permanent means to provide structural stability and insulation. Mixing this special concrete follows almost exactly the same mixing procedures as the traditional concrete. The only difference is using lightweight Styrofoam balls instead of cracked stones in mixing concrete. The injection of a different material brings benefits as the following:
Easy to plaster, glue and paint: it eliminates the need for an extra layer fothese purposes.
Easy to cut: Polystyrene concrete is softer and lighter than traditional concrete.
Low water absorption: Due to the hydrophobic property of polystyrene materials, it will keeps the majority of water from intruding inner structure of the building.
High impact resistance: The low density styrofoam is better at cushioning and absorbing outside force than stones in traditional concrete, thus protects the structure from external impact.
High viscosity and strength: Though being made of a lighter weight material, the elastic polystyrene concrete is still able to withstand tremendous tensile stress than traditional stone concrete.
Fire-resistant and low thermal conductivity: Poor thermal conductivity nature of the concrete makes sure the interior temperature does not easily gets affected by outside weather fluctuations.
Don't forget, styrofoam is a material that takes forever to decompose in nature. The introduction of this new concrete remove the environmentally harmful material out of landfills. And the concrete is so light that it's buoyant in water， though not particularly useful in industrial use.
The polystyrene featured in this article is manufactured by the Siberian Construction Technology.
Credit to Joe Kurz for pointing out an editorial error in the article where it said "Styrofoam is a non-recyclable material". Styrofoam is a recyclable material.