What Role Can Steel Fiber Play in Concrete?

Ⅰ. What is steel fiber concrete

Steel fiber reinforced concrete is a new type of composite material with excellent performance and wide application. Steel fibers are usually randomly distributed in the concrete or cement mortar matrix in the form of short fibers.

As steel fiber retards the expansion of cracks in the base concrete, its tensile, flexural, and shear strength are significantly improved compared to ordinary concrete, and its impact resistance, fatigue resistance, post-cracking toughness and durability are also greatly improved. In the past 20 years, a lot of researches have been done on the mechanical and structural properties of steel fiber concrete at home and abroad, and the fiber of steel fiber company has been used in various projects such as roads, bridges, tunnels, water conservancy, ocean, construction and refractory structures.

Ⅱ. The shape of steel fiber concrete

The general steel fiber produced are: straight shape, hooked shape, wave shape, concave and convex shape, pressed prismatic shape, dumbbell shape, staple shape, irregular shape, etc.

Ⅲ. Main materials of steel fiber concrete

The mixing material of steel fiber reinforced concrete is made up of cement, water, coarse and fine aggregate, steel fiber, and when necessary, chemical additives or admixtures are mixed in a certain proportion. The thing that added into the concrete mixture is a kind of random, discontinuous and randomly distributed short steel fibers.

Ⅳ. Main performances of steel fiber concrete

1. High crack resistance to retard the expansion of cracks

2. Good anti-seepage and moisture-proof performance

3. Higher tensile strength, flexural strength and good impact resistance

4. Wear resistance, fatigue resistance, durability and corrosion resistance

5. Higher bending performance and toughness

6. High strength, high rigidity and strong shear resistance

Ⅴ. The application of steel fiber

1. Industrial building ground (foundation bearing ground, pile-supported ground and seamless ground)

2. Anti-seepage and waterproof engineering

3. Road pavement engineering

4. Airport road surface engineering

5. Rigid waterproof engineering

6. Bridge structure and surface

7. Hydraulic construction

8. National Defense Military Engineering

9. Lining and support of tunnels, tunnel holes and underground engineering

10. Prefabricated components

11. Partial structural reinforcement and repair engineering

Ⅵ. Construction process of steel fiber

Industrial floor

Foundation treatment - steel fiber and concrete mixing - pouring - surface leveling and polishing - cutting seams - maintenance

Tunnel construction

Rock surface cleaning - steel fiber and concrete mixing - spraying - maintenance