Reinforced steel fiber concrete is a significant method to enhance concrete quality. Fiber concrete is typically a cement-based composite material composed of a base material such as cement paste, mortar, or concrete, reinforced with either discontinuous short fibers or continuous long fibers. Its primary function is to restrict the development of interfacial cracks through bridging effects, thereby improving the performance of concrete.

The role of steel fiber in the cement matrix:

1. Crack Retardation. It hinders the expansion of defects (microcracks) in the cement matrix and effectively delays the appearance of new cracks.

2. Waterproofing. By preventing cracks, it enhances the compactness of the cement-based matrix, preventing external moisture intrusion.

3. Durable. Enhances the cement matrix's frost and fatigue resistance, improving its durability.

4. Impact Resistance. Enhances the cement matrix's ability to withstand deformation, thereby improving its toughness and impact resistance.

5. Tensile resistance. Under the premise of using high modulus fibers, it can enhance the tensile strength of the matrix.

6. Attractive. Enhances the appearance of cement structures, making them finer, smoother, flatter, and more attractive.