Copper-coated Steel Fiber for Ultra-High Performance Concrete

Ultra-High Performance Concrete (UHPC) has become the preferred material for landmark facades, bridge joints, precast components, marine structures and thin-section decorative elements, thanks to its ultra-high compressive strength, low porosity and outstanding durability. However, plain UHPC remains brittle without proper fiber reinforcement. Copper coated steel fiber is widely recognized as the core reinforcing material to unlock the full toughness of UHPC systems.

Our copper coated micro steel fiber is manufactured from high-carbon high-tensile steel wire with a uniform thin copper coating on the surface. Typical tensile strength reaches 2800MPa and above, available in common sizes such as 0.15–0.22mm diameter, 6mm, 10mm, 13mm lengths, and custom specifications are supported for different UHPC mix designs.

The copper coating brings three key advantages that distinguish it from ordinary hooked steel fiber for UHPC. First, it greatly improves the interfacial bonding between fiber and cement matrix, delivering stable post-crack performance, better flexural toughness and energy absorption capacity. Second, the copper layer helps reduce corrosion risk during mixing, storage and long-term service, especially valuable for coastal and high-chloride environments. Third, it ensures excellent dispersion in low water-binder UHPC slurry, avoiding fiber clustering and keeping the self-compacting flowability of fresh UHPC, which is critical for thin precast panels and complex formwork shapes.

When properly dosed, our copper coated steel fiber effectively bridges microcracks, restrains crack propagation, and improves residual tensile strength. It also gives UHPC stable conductive and self-sensing properties, which supports smart structural monitoring for infrastructure projects.

Typical application scenarios include UHPC bridge deck connections, RPC reactive powder concrete, architectural precast facade panels, thin decorative components, high-speed rail precast parts, marine repair structures and anti-impact engineering elements.

We supply stable bulk shipments with full test reports, including tensile strength, coating quality, dispersion test and corrosion resistance data, complying with international standards. We can also provide technical support on mixing sequence, recommended dosage and mix proportion adjustment for your UHPC formula.

If you are looking for reliable copper coated steel fiber for your UHPC projects, welcome to contact our engineering team for samples and technical consultation.