Steel Fibres

Steel fibres are short, thin strands of steel mixed directly into concrete to improve its strength and durability. They help control cracking, enhance impact and abrasion resistance, and increase overall toughness, making them especially useful in industrial floors, pavements, precast elements, and large-scale civil engineering projects.

Material & Type

• Material: Cold-drawn carbon steel or stainless steel

• Shapes: Hooked-end, crimped, straight, or twisted

• Surface: Often brass- or copper-coated to improve bond

Dimensions

• Length (L): Typically 25 – 60 mm

• Diameter (d): 0.3 – 1.0 mm (aspect ratio = L/d)

• Aspect Ratio (L/d): 40 – 80 (higher ratios for structural use)

Mechanical Properties

• Tensile Strength: ≥ 1,000 MPa (structural grade often 1,100–1,500 MPa)

• Elastic Modulus: ~200 GPa (same as steel rebar)

• Density: ~7,850 kg/m³

Dosage in Concrete

• Light duty (crack control): 20 – 30 kg/m³

• Industrial flooring & pavements: 30 – 40 kg/m³

• Heavy-duty/structural elements: 40 – 80+ kg/m³ (depending on design)