GFRP type composite rebar is a glass fiber reinforced polymer rod made from bundles of glass fibers impregnated with a heat-cured polymer resin. The color of the braces ranges from light yellow to dark yellow. Usually 6 mm; 8mm; 10 mm; 12mm; 14 mm; 16mm; 18mm; They are made with 20 diameters. Those with a diameter of 6 - 10 mm are sold in rolls of 100 meters in length. In 50 meter rolls with a diameter of 12 mm. The larger diameters are: 14, 16, 18, 20- in 12 meter strands.
The outer side of the bars is surrounded by a coiled spiral rib (braid), which ensures perfect adhesion to the concrete.
The GFRP composite armature is mainly made for reinforcing concrete structures. It is mainly used in those parts of buildings that are exposed to an increased risk of corrosion, in structures that require protection against increased electromagnetic influence, and in structures where it is expected that a cut will have to be made in the already stiffened structure.
In terms of specific tensile strength, it is 2-3 times higher than the steel used. The thermal expansion of composite reinforcement is equal to that of concrete. Composite glass fibers make it possible to significantly reduce the thickness of the concrete layer. Greater distance between the bars - material savings
The composite armature has many areas of use , e.g.:
It has a wide range of applications in architecture, as it has excellent properties such as lower weight and greater strength , which are closely related to the lower purchase price/investment cost, as well as simpler logistical solutions (material transport).
- Stiffening of concrete in corrosive, chemical or ionizing environments
- Reinforcement of a thin layer of concrete or prefabricated elements
- Reinforcement of concrete in case steel reinforcement cannot be used due to electrical induction
- Reinforcement of tunnels, bridges, foundations, pools, walls, columns and other concrete structures in contact with water
- Non-conductive floors of power plants and substations, in the vicinity of electric poles or in high-voltage buildings
- Rooms of hospitals containing sensitive instruments, buildings for calibration of electronic equipment (magnetic materials)
- Military facilities (where it is required that they cannot be reached by radar), telecommunication facilities (does not affect radio waves)
- Stiffening of tunnels where subsequent holes may have to be drilled without damaging the drilling equipment
- Reinforcement of chemical plants and facilities with aggressive environments
- Renovation and repair of carbonized concrete on balconies
- Many more demanding applications and options
Alapvető jellemzők / a kompozit armatúra összehasonlítása a ma használt betonacéllal