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Steel fibers for concrete reinforcement

Steel fibers are made of cold drawn steel wire with low content of carbon (C) or stainless steel wire (SS 302/ SS 304).

Steel fibers are manufactured in different types: hooked, undulated or flat, according to the construction project. These fibers are used in construction, for concrete reinforcement.

Fiber-reinforced normal concrete is mostly used for on-ground floors and pavements, but can be considered for a wide range of construction parts (beams, pilars, foundations etc) either alone or with hand-tied rebars.

Features

  • fiber-reinforcement is mainly used in shotcrete, but can also be used in normal concrete fiber;
  • steel fibers reinforced concrete are less expensive than hand-tied rebar, while still increasing the tensile strength many times;
  • shape, dimension and length of fiber are important
  • a normal size fibre for European shotcrete (1 mm diameter, 0.5 mm length—steel) will increase the concrete tensile strength;
  • steel fibers can only be used on surfaces that can tolerate or avoid corrosion and rust stains;

Application

  • tunnel lining
  • airport runways
  • highways pavements
  • precast concrete
  • shotcrete
  • parkings
  • anti-seismic builings

Steel fibers

Technical details

Type of steel fiber

Size range
(dia. of wire mm)

Length
(mm)

flat

0.175 – 0.42

6, 12.5, 16, 25

hooked

0.4 – 1.05

25, 30, 50, 60

undulated

0.5 – 1.05

30, 40, 50, 60

   
Standards

ASTM 820/96

  ASTM C 1116/95
  DIN 1045
   
Tensile strenght (T/S) 1.100 N/mm2
   
Shapes

flat

  hooked
  undulated
   
Packing in paper bags or cardboard boxes of 20-25 kg, set on wooden pallets (IPPC standards) of about 1 MT, protected by polyethyene shrink, well tied with metalic strips.
   
Yearly production ± 4.000 tones
   



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