So how is BFRP (Basalt Fiber Reinforced Polymer) based materials different than steel, CFRP and GRFP? It is not the answer to every application but has excellent applications where it makes sense and of course cents. Using an FRP to extend the current life-cycle of infrastructure ravaged by environmental factors including freeze/thaw cycles, exposure to road salts and chlorides to name a few. Some FRP’s can also be used in new design to lengthen the life-cycle from current levels to well in excess of 100 years. Unlike CFRP which is lighter weight than BFRP (Basalt Fiber Reinforced Polymer), it is significantly more expensive and limited in application. GFRP has composition properties very close BFRP (Basalt Fiber Reinforced Polymer) in rebar form. Below is a brief chart comparing all four in their rebar forms.
Mechanical Properties | Reinforcing Steel | CFRP | GFRP | TXON GRP® (BFRP) |
Elastic Modulus (GPa) | 200 | 150 - 175 | 30 - 50 | 50 – 55 |
Tensile Strength (MPa) | 400-500 | 1600 - 2400 | 500 - 1000 | 940 – 1000 |
Yield Strain (%) | 0.2 | - | - | - |
Ultimate Strain (%) | ≈30 | 1 - 1.5 | 1.5 - 2.0 | 1.5 - 2.0 |