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STEEL FIBRE

Steel Fibre

Concrete is one of the amazing construction materials widely used across the globe. However, the brittle nature and weak tensile strength make the concrete vulnerable to tensile forces. Hence, the concrete needs reinforcement materials to improve its tensile strength and strain capacity. Steel Fibre having high tensile strength makes it the best choice as the reinforcement material to transform the concrete into a more desirable construction material.

Steel Fibres can be defined as a discrete, short length of steel having a ratio of its length to diameter (i.e. aspect ratio) in the range of 20 to 100 with any of the several cross-sections, and that are sufficiently small to be easily and randomly dispersed in the fresh concrete mix using conventional mixing procedure.

Features of Steel Fibre Reinforced Concrete (SFRC)

  • Flexural Strength: Flexural bending strength can be increased by up to 3 times more compared to conventional concrete.
  • Fatigue Resistance: Almost 1 1/2 times increase in fatigue strength.
  • Heavy Impact Resistance: Greater resistance to damage in case of a huge impact.
  • Permeability: The material is less porous.
  • Abrasion Resistance: More effective composition against abrasion and spalling.
  • Shrinkage: Shrinkage cracks can be eliminated.
  • Corrosion: Corrosion may affect the material but it will be limited in certain areas.

There are different types of Steel Fibres, like Mild Steel Fibres, Mild Steel Fibres having high tensile nature, Mild Steel Fibres which are galvanized.

  • Steel Fibres are seen in various shapes and sizes also, such as Hooked-end Steel Fibre that prominently prevents micro-crack expansion, significantly enhances initial crack strength continuously provides post-crack strength.
  • Crimped Steel Fibre is designed to provide concrete with temperature and shrinkage crack control, enhanced flexural reinforcement, improved shear strength, and increased crack resistance of concrete.
  • Round crimped Steel Fibre is a new type of reinforced fibre.
  • The corrugated profile adds pull-out resistance compared with rebar, which is increasingly replaced by steel fibres.
  • The benefits include excellent shrinkage control.
  • Ideal for jointless industrial floors and structural applications.

It is a cold-drawn Steel Fibre fabricated from high-quality, low carbon steel for applications in cement concrete. It is evenly dispersed in the concrete mixture to provide improved mechanical properties of concrete such as flexural strength, shear strength, fatigue endurance, impact resistance, and ductility. Toughcrete is cost-effective concrete reinforcement that is designed for ease of mixing, placing, and finishing. Toughcrete is available in ‘Hooked end’, ‘Round Crimp’ and ‘Flat crimped’ form.

Type Product Description Length (mm) Diameter (mm) Aspect Ratio Tensile Strength (MPA)
Loose LSF 25/50 25 0.50 50 1250
Loose LSF 25/45 25 0.55 44 1250
Loose LSF 30/60 30 0.50 60 1250
Loose LSF 30/55 30 0.55 55 1250
Loose LSF 30/50 30 0.60 50 1200
Loose LSF 30/45 30 0.65 45 1175
Loose LSF 35/70 35 0.50 70 1250
Loose LSF 35/65 35 0.55 65 1250
Loose LSF 35/60 35 0.60 60 1200
Loose LSF 35/55 35 0.65 55 1175
Loose LSF 35/50 35 0.70 50 1150
Loose LSF 35/45 35 0.75 45 1150
Loose LSF 50/65 50 0.75 65 1150
Loose HTLSF 50/55 50 0.90 55 1500
Loose LSF 50/55 50 0.90 55 1100
Loose HTLSF 50/50 50 1.00 50 1400
Loose LSF 50/50 50 1.00 50 1050
Loose LSF 60/80 60 0.75 80 1150
Loose LSF 60/65 60 0.90 65 1100

It is the Glued Steel Fibre. Glued steel fibre refers to loose hooked end fibres glued together in a row way. The big difference between loose and glued fibres is that the former is easy to block together and the latter is easy to disperse uniformly. The three-dimensional reinforcement in Glued Steel Fibre avoids all cracks. Toughcrete+ is available in ‘Hooked end’ form.

Type Product Description Length (mm) Diameter (mm) Aspect Ratio Tensile Strength (MPA)
Glued GSF 35/70 35 0.50 70 1250
Glued GSF 35/65 35 0.55 65 1250
Glued GSF 35/60 35 0.60 60 1200
Glued GSF 35/55 35 0.65 55 1175
Glued GSF 35/50 35 0.70 50 1150
Glued GSF 35/45 35 0.75 45 1150
Glued GSF 60/80 60 0.75 80 1150
Glued GSF 60/80 60 0.75 80 1200
Glued HTGSF 60/80 60 0.75 80 1450
Glued HTGSF 60/65 60 0.90 65 1500
Glued HTGSF 60/60 60 1.00 60 1400

Compliance with ASTM A820 Toughcrete available in 'Hooked end', 'Round crimp' and flat crimped forms and Toughcrete+ available in Hooked end form. It is manufactured in various diameters, lengths, and aspect ratios to suit specific applications in SFRC. No special equipment is required for mixing, placing, or finishing. Toughcrete+ is specially designed to eliminate the balling effect during mixing.

Toughcrete and Toughcrete+ are widely used in cement for shotcreting. It reduces the cost of the work and eases the complexity of the architectural design.

Advantages of Steel Fibre

  • Improve the load-bearing capacity of concrete
  • Reduces thickness of the concrete slab
  • Enhance durability
  • Minimize maintenance cost
  • Improved flexibility
  • Less absorption of water
  • Reduces cost of the project
  • Can be utilized on the fast track plan
  • Simpler positioning of joints
  • Harder surface with fewer bleed gaps