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FRP Composite Rebars

Durostone® FRP Rebar High performance reinforcement bars

For corrosion-free, high strength, durable and very economic structures

Durostone® FRP Rebar. The new generation of fibre-reinforced composite reinforcement bars. Combine extremely high strengths with low weight and longer service life. Specially developed for demanding applications that require high mechanical stability and corrosion resistance from reinforcement bars. Available as:

  • Durostone® GFRP Rebar – Glass-fibre-reinforced plastic (GFRP)
  • Durostone® BFRP Rebar – Basalt-fibre-reinforced plastic (BFRP)


Fiber Reinforced Polymer Reinforcement Bar

Significantly reduced maintenance and service life costs compared to conventional steel rebars
High performance replacement for reinforcement bars made of: Inox stainless steel, Epoxy coated steel, Galvanised steel and Black steel/ reinforcement steel

Reference projects

For demanding fields of application

Durostone® FRP Rebars were especially developed for demanding fields of application in aggressive environments, where reinforcement bars have to withstand permanently high mechanical and corrosive loads. Durostone® FRP Rebars have outstanding properties for such requirements. For example:

Corrosion resistance
Building structures next to sea and in coastal regions which are exposed to severe corrosion: harbour installations, docks, underwater tunnels, desalinisation plants, breakwaters, embankments, quay walls, windmills, roads and buildings and concrete roadbases exposed to sea spray
Alkali-resistance & durability
All concrete structures and transport routes exposed to frost and thawing saltwater: bridge decks, road construction, air fields, concrete casings, flood protection walls; canals and harbour basins (fresh water engineering), lock walls, dam projects
Chemical resistance
Structures in aggressive chemical media environments: Sewage treatment and biogas plants, refineries, paper mills, sewer systems, underground garages also without floor coatings, industrial floor slabs, agrarian buildings such as silage and fertiliser silos
Easy machinability
Special civil engineering, tunnel construction, mining and inner-city infrastructure buildings: temporary and permanent anchors. Easy cuttability for tunnel-boring machines (TBM) in soft eyes, concrete reinforcement for underground railway construction and road tunnels, rock face stabilisation, soil nails, anchor pins, diaphragm walls, bored piles
No conductivity & no frequency disturbance
Sensitive functional areas in which electric and thermally non-conductive, induction-free, non-magnetic or signal-permeable reinforcements are necessary: high voltage installations, transformer buildings, railway and airport structures, slab roadways, frequency sensitive switching and control installations, telecommunications infrastructures, industrial systems with driverless transport systems, medical and research institutions
High tensile strength & minimum component thickness
Prestressing technology: Durostone® BFRP Rebars with basalt fibre reinforcing are especially suitable for prestressing technology with very high tensile strength Filigree and solid prefabricated concrete parts: lightweight material for core-insulated double walls, sandwich elements, solid concrete panels and facade elements with high quality design surfaces. Concrete preformed structures in tunnel construction, sewer pipes, shaft accesses, concrete sleepers
Port of Miami tunnel project
Construction of two tunnel tubes and connection to the existing road network. The tunnel connects Watson Island with the container and cruise ship harbour of Miami to Dodge Island. Durostone® BFRP Rebars were used to reinforce two retaining walls, which withhold high impact loads in the entry and exit area of the Watson Island side of the tunnel in the event of accidents.
Project Tangier – Morocco
Establishment of a container harbour on the Atlantic coast of Morocco. Durostone® BFRP Rebars were used in concrete slabs as near surface reinforcement. This position is most exposed to sea water and as a result the area most susceptible to corrosion. The slabs form the upper termination of a 2.6 km quay wall.

High corrosion resistance –  No rust

  • Permanent alkali and chemical resistance and high acid resistance, also in very demanding environments 
  • Resistant to concrete carbonation and in the event of acidic impact, e. g. aggressive mountain water or industrial waste water
  • Prevents concrete spalling and protects static structural parts

High economic efficiency – Reduction of lifecycle costs

  • Significantly reduced maintenance and service life costs
  • Considerably lower to no repair and replacement costs
  • More quality, but no higher construction costs; instead, savings potential compared to steel
  • Cost reduction of structures through minimal requirements for concrete covering (rod diameter + 10 mm), through possible use of conventional concrete qualities or through elimination of expensive additives and protective coatings
  • Up to fourfold savings in transport costs due to 73 % lower deadweight

Greater mechanical stability with low weight – High strength

  • Enormous tensile strength and first class durability of mechanical properties 
  • Very good bond strength properties for ideal force transmission 
  • Lightweight material with only 27 % of the weight of steel 
  • Minimised deadweight of concrete structures. Permits filigree structures
  • Much easier and less dangerous handling on building sites

High safety and functionality

  • No electric or electromagnetic conductivity 
  • No magnetism and no disruption of sensitive electronic installations 
  • Transparent for radar and radio waves
  • Very low heat conductivity, as a result avoidance of thermal bridges 
  • Easy machinability. Easy cutting properties of the reinforcement prevents damage to tools and machinery in civil engineering and tunnel construction

Long service life and extremely high quality – Sustainable

  • High quality corrosion resistant fibres and highly durable quality resins and the precise Durostone® FRP Rebar manufacturing process ensure outstanding qualities and an innovative building material with uniquely bundled properties 

  • Sturdy, durable composite reinforcement in concrete 

  • Much longer service life for heavily stressed structures

Production range

  • Standard sizes: 10 mm, 13 mm, 16 mm, 19 mm, 25 mm, 32 mm 
  • Other tailor-made sizes available on request

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