Commonly used fibers in concrete include:

Glass fiber: Offers excellent insulation, heat resistance, and corrosion resistance, but is brittle and has poor wear resistance. Alkali-resistant glass fiber is essential, with a 2% addition, but the concrete mix suffers from poor fluidity.

Steel fiber: Has an aspect ratio of 40-80. When added to concrete, it causes significant wear and tear on machinery and slump loss during mixing and pumping. It is often used for crack-resistant and impact-resistant surfaces.

Polypropylene fiber: Made from polypropylene, it exhibits excellent dispersibility and strong adhesion to the cement matrix. Adding it to concrete improves its crack resistance, frost resistance, impermeability, impact resistance, and wear resistance. At a concentration of 0.8-1.0 kg/m³, the flexural and tensile strengths of concrete can be increased by 10%, concrete shrinkage can be significantly reduced, and pumpability and workability are improved.

Hybrid fiber: A fiber composed of two or more fibers mixed in a specific ratio. Incorporating several fibers simultaneously into concrete maximizes the advantages of each fiber and creates a synergistic effect. Currently, polypropylene fibers and steel fibers are commonly mixed. Hybrid fiber concrete exhibits superior performance compared to concrete with a single fiber.