Macro synthetic fibres are long, durable, man-made fibres used as reinforcement in concrete and cement-based materials. Made from polymers such as polypropylene, polyethylene, or nylon, they are designed to improve the structural performance of concrete by controlling cracking, reducing shrinkage, and enhancing toughness. Unlike microfibres, macro fibres provide post-crack load-bearing capacity, making them ideal for slabs, pavements, industrial floors, and shotcrete applications. They are lightweight, corrosion-resistant, and easy to mix into concrete without affecting workability. Macro synthetic fibres offer a cost-effective alternative to steel reinforcement for certain applications.
| Property | Specification / Typical Value |
|---|---|
| Fibre Type | Polypropylene / Polyethylene / Nylon |
| Length | 30 – 60 mm (common range) |
| Diameter | 0.5 – 1.2 mm |
| Specific Gravity | 0.91 – 0.96 g/cm³ |
| Tensile Strength | 300 – 600 MPa |
| Elastic Modulus | 3 – 8 GPa |
| Melting Point | 160 – 170 °C (Polypropylene) |
| Water Absorption | Negligible |
| Corrosion Resistance | Excellent |
