The manufacturing process of basalt fiber for concrete reinforcement
The basalt fibers are unwind of as many bobbins roving as necessary to get the desired diameter of the rebar. During the pulling of the rovings they are led through a bath of liquid resin.
After the application of the resin, the rovings are drawn by a norrowing mold gate, and finally through a heated mold which is equal to the desired diameter. The heat in the mold causes the resin liquid turns into a solid composite.
The former basalt reinforcement was cylindrical in shape. Research has shown that more texture is necessary to have a good mechanical adhesion between the rod and the concrete., the spiral winding of a band around the basalt fiber reinforcement, while it is still soft and deformable is the succesful system for this purpose.
The use of basalt fiber rods has a series of advantages compared to conventional reinforcing bars:
- Basalt fibers have a 100% C02 footprint.
- The physical properties of basalt fiber are very attractive. Compared with E-glass, the most common type of basalt fiber has a higher tensile strength and E modulus, better thermal stability, better resistance to acids and alkalis and not absorbing water through the core of the fiber like fiberglass does.
- Compared to carbon fibers, basalt is much lower in cost and creates complete absence of conductivity and the self-induction when exposed to electromagnetic radiation.
- Reinforcement of basalt is much stronger and lighter than steel with the same diameter.
The basalt fiber reinforcement is standard available in a diameter of 4 up to 16 mm.
Larger diameters can be produced in consultation.