Mild steel rebar is the most commonly used material in the reinforcement of concrete slabs or in the construction of straw bale walls. The common acceptance of this material overlooks some environmental issues; the production of steel has a high environmental impact and the steel grid can cause an unhealthy magnetic field in the home.
Originally developed to combat cracking of concrete as steel rebar corrodes, the benefits of FRP (Fiber Reinforced Polymer) rebar was soon realised. Apart from it’s non-corrosive property, it is non-magnetic and will not interfere with electrical or communication signals, has a higher tensile strength than steel and is one quarter the weight of steel
FRP rebar cannot, however, be bent or welded in the field. Factory made bends and joins must be used.
Source: ATM Export Management