Steel fiber manufacturer

I. Steel Fibers: The "Invisible Reinforcement Network" for Concrete Performance

Steel fiber concrete forms a three-dimensional randomly distributed reinforcement network by incorporating short steel wire fibers (with a diameter of 0.2-3mm and a length of 10-60mm) into the cement matrix. This technology can significantly enhance the following properties of concrete:

Crack Resistance: It suppresses early plastic shrinkage cracks, reducing the crack width by 60%-80%.

Impact Resistance: Drop hammer impact tests show that the energy absorption is increased by 40%-70%.

Durability: The service life is extended by 2-3 times in a salt spray environment (verified by ASTM C1116).

As a supplier for infrastructure projects in 28 countries around the world, Daye has been focusing on the research, development, and production of steel fibers for 20 years. Its products have been certified to meet international standards such as ASTM A820 and EN 14889-1.

II. Five Core Functions of Steel Fibers

Replacement of Traditional Steel Bars

In scenarios such as industrial floors and tunnel linings, steel fibers can completely replace steel mesh sheets, increasing the construction efficiency by 35% (calculated based on a 10,000㎡ project).

Control of Crack Propagation

The bonding force between the fibers and the cement paste reaches 3-5MPa, effectively preventing micro-cracks from developing into structural cracks.

Enhancement of Fatigue Resistance

Dynamic load tests show that the flexural fatigue life of steel fiber concrete is extended to 10 times that of ordinary concrete.

Improvement of Fire Resistance

Stainless steel fibers (made of 316L material) still maintain 70% of their residual strength at a high temperature of 1,200℃, making them suitable for the inner lining of industrial kilns.

Realization of Complex Shapes

It supports new processes such as 3D printed concrete and curved surface curtain walls. A case in point is the UHPC sculpture group at the Dubai World Expo.

III. Global Engineering Cases of Steel Fiber Concrete

In the Field of Transportation Infrastructure

Polar Bridge Project: The bridge in the Arctic Circle of Norway uses UHPC steel fiber concrete, which has passed the freeze-thaw cycle verification at -30℃. When the fiber dosage is 1.2%, the flexural strength is increased by 80%.

Tropical Marine Bridge: The Second Penang Bridge in Malaysia uses 316L stainless steel fibers, which have shown no rust after serving for 10 years in a sea area with a salt spray concentration of 5%, reducing the maintenance cost by 60%.

Airport Runway Upgrade: The runway of Munich Airport in Germany uses wavy steel fibers (35mm long), extending the spacing of expansion joints to 50 meters and reducing the thickness of the pavement by 30%.

Energy Facility Construction

Nuclear Power Plant Containment: The containment of Yangjiang Nuclear Power Plant in China uses end-hook steel fiber concrete, which has passed the IAEA seismic resistance level 9 certification, and its impact resistance is 20 times that of ordinary concrete.

Spillway of Hydropower Station: The spillway of the Thar Power Station in Pakistan uses polypropylene composite fibers, which can withstand the load of a forklift of 8 tons/㎡, and the wear resistance index is increased by 4 times.

Urban Construction Innovation

Fire Protection System for Super High-Rise Buildings: The Shanghai Tower applies a stainless steel fiber fire protection layer, which has passed the UL 1709 standard test, and the fire resistance limit reaches 4 hours.

3D Printed Building Components: The sculpture group at the Dubai World Expo uses customized steel fibers (with a diameter of 0.2mm), realizing a 5-meter cantilever structure without steel bar support.

IV. Six Advantages of Choosing Daye Steel Fibers

Full Process Certification: ISO 9001 quality management system, providing a metallographic inspection report for each batch.

Production Capacity Guarantee: An annual production capacity of 50,000 tons, with a 72-hour emergency order response.

Global Delivery: Logistics via the ports of Xiamen and Shenzhen, and DDP trade terms covering 28 countries.

Technical Support: Free provision of the "Steel Fiber Dosage Calculation Software" and construction guidance.

Customized Services: Supporting customization of length (12-60mm), coating (zinc/copper), and packaging.

Green Production: A scrap steel recycling rate of 98%, and awarded the ECOVADIS Silver Medal Certification.

V. Analysis of Core Technical Advantages

Revolutionary Breakthrough in Crack Resistance

Steel fibers form a "micro-skeleton" through a three-dimensional random distribution, increasing the tensile strength of concrete by 25%-50% and the flexural strength by 40%-80%, effectively suppressing the propagation of micro-cracks at the 0.1mm level. In the Norwegian bridge project, the crack width control ability reaches 0.08mm, which is 65% better than that of traditional concrete.

Dynamic Load Tolerance

Drop hammer impact tests show that end-hook steel fibers with a dosage of 2% can increase the energy absorption value to 470kJ/m³, and the impact resistance is 15 times that of plain concrete. The actual measurement data of the runway of Munich Airport in Germany shows that the fatigue resistance life of steel fiber concrete is extended to 10 times that of ordinary materials.

Economy in the Whole Life Cycle

Material Cost Optimization: Under the same strength, the cement consumption is reduced by 30%, the diameter of the steel bars can be reduced by 1-2mm, and the comprehensive cost is reduced by 18%.

Extension of Maintenance Cycle: The 60m steel fiber concrete arch bridge in Chongqing only needs to be repaired once after 12 years of operation, reducing the maintenance frequency by 75%.

Adaptability to Complex Environments

Extremely Cold Environment: After 300 freeze-thaw cycles at -30℃, the mass loss rate is ≤0.8% (in line with ASTM C666 standard).

Chemical Corrosion: 316L stainless steel fibers show no corrosion after a 2,000-hour salt spray test in an acidic environment with a pH of 3.5.

Solutions for Improving Construction Efficiency

By eliminating the traditional process of steel bar binding, the construction period of the Second Penang Bridge project in Malaysia is shortened by 35%, and the labor cost is saved by 42%. In the 3D printing process, the interlayer bonding strength of steel fiber concrete is increased to 3.5MPa, and the printing speed is doubled.

VI. Technical Parameters and Selection Suggestions

Material Selection Matrix

For UHPC projects: Preferably select cold-drawn high-carbon steel fibers with a diameter of 0.15-0.3mm and a tensile strength of ≥1100MPa.

For marine projects: 316L stainless steel fibers (salt spray test ≥2000h) + epoxy resin coating.

For prefabricated buildings: Polypropylene composite fibers (with a density of 4.2g/cm³), with the alkali environment tolerance increased by 3 times.

Dosage Control Standard

For crack resistance requirements: The volume dosage is 0.8%-1.2% (crack control level II).

For seismic resistance requirements: The dosage is ≥1.5% and the length-diameter ratio is 60-80.

For economic balance: For road projects, a recommended dosage of 1.0% + a fiber recycling system.

VII. Frequently Asked Questions (FAQ)

Q: Will steel fibers rust and affect the lifespan of concrete?

A: Daye stainless steel fibers have passed the ISO 9227 standard verification, and ordinary copper-plated fibers are stable in an environment with a pH>3.5.

Q: How to proportion steel fiber concrete?

A: Visit the official website to download the "Steel Fiber Dosage Design Guide", or call the technical team to obtain a customized solution.

Q: Can it be used in combination with steel bars?

A: It can be used in combination, and it is recommended for use in composite stress parts such as bridge piers.