High-Performance Copper Coated Steel Fiber for Concrete & UHPC Reinforcement
1. Product Overview
Our copper coated steel fiber is a premium, high-tensile micro steel fiber engineered specifically for Ultra-High Performance Concrete (UHPC), advanced mortar, and heavy-duty concrete reinforcement. Manufactured from high-carbon steel wire through precise cold drawing, these monofilament straight fibers are coated with a thin layer of copper to provide exceptional corrosion resistance and superior interface bonding within the cementitious matrix.
Whether used in prefabricated modular construction, high-load industrial flooring, or critical infrastructure reinforcement, our micro steel fibers deliver ultimate structural strength and crack control.
2. Technical Specifications & Material Dimensions
To meet global civil engineering standards (ASTM A820, EN14889, ISO certified), we supply a wide range of aspect ratios and sizes tailored to your unique mix design.
| Parameter | Specification Details |
| Material Type |
High Carbon Steel / Alloy Steel |
| Surface Coating |
Pure Copper Coated / Brass Coated |
| Fiber Shape |
Monofilament Straight Fiber / Loose Steel Fiber |
| Diameter ($\Phi$) |
0.2mm, 0.22mm, 0.35mm, 0.55mm |
| Length ($L$) |
6mm, 13mm, 20mm, 25mm |
| Tensile Strength |
High Tensile / Ultra High Strength ($\ge 2000$ MPa) |
| Standards Compliance |
ASTM A820, EN14889, CE Certified, ISO Certified |
3. Key Performance & Advantages
Integrating our copper-coated micro steel fibers into your cement mix ratio radically enhances the mechanical properties and durability dimensions of the concrete matrix:
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Ultimate Tensile & Flexural Strength: Dramatically boosts the compressive strength (100Mpa – 250Mpa+) and load-bearing capacity of UHPC.
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Superior Crack Control: Prevents macro and micro cracks caused by drying shrinkage, autogenous shrinkage, and thermal stress.
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High Workability & Fluidity: Optimized for self-compacting, pumpable, sprayable, and pourable concrete applications without balling.
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Exceptional Durability Enhancement: Offers strong anti-cracking, impact protection, fatigue resistance, and freeze-thaw resistance.
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Corrosion & Chemical Resistance: The copper coating acts as a shield against chloride penetration, moisture, and chemical attacks in harsh environments.
4. Key Application Scenarios
Our copper coated metal fiber reinforcement is widely adopted across industrial, commercial, and infrastructure engineering sectors:
🏢 UHPC & Precast Concrete Structures
Perfect for thin-wall, thin-section components, precast panels, precast beams, facade cladding, and modular building construction where high density and lightweight structures are required.
🌉 Bridge & Tunnel Infrastructure
Extensively used in bridge deck reinforcement, bridge joints, bridge strengthening, tunnel shotcrete (sprayed concrete), mining rock support, and slope stabilization.
🏭 Industrial & Heavy-Duty Flooring
Ideal for industrial flooring, warehouse floors, factory floors, airport runways, and highway pavements that endure continuous heavy load transfer and abrasion.
🌊 Marine & Coastal Engineering
Provides premium structural reinforcement for offshore platforms, port foundations, harbor structures, and coastal seawater-resistant structures.
5. Recommended Fiber Dosage & Mixing Guide
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Volume Fraction: Typically ranges from 1 percent fiber to 4 percent fiber loading by volume (approx. $40\text{kg/m}^3$ to $160\text{kg/m}^3$), depending on the structural strength requirements.
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Mix Design: Seamlessly blends with cementitious binders, silica fume, quartz sand, and superplasticizers (HRWR).
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Mixing: Add the individually dispersed loose steel fibers during the dry mix stage or along with aggregates to ensure uniform distribution and maximum interface bonding.
❓ Frequently Asked Questions
Q1: Why choose copper coated steel fiber over hooked end steel fiber for UHPC?
A: Copper coated micro steel fibers have a much smaller diameter ($0.2\text{mm}-0.3\text{mm}$) and straight shape, allowing billions of fibers to disperse uniformly in a dense matrix like UHPC. Hooked end fibers are macro fibers, better suited for regular industrial concrete flooring rather than thin-section ultra-high strength concrete.
Q2: Does the copper coating prevent rust in marine environments?
A: Yes. The premium copper coating provides initial corrosion resistance during the concrete curing process and enhances high adhesion and bond strength between the steel wire and cement. Once embedded in the dense matrix of high-durability concrete, it effectively resists chloride and moisture penetration.
Q3: What is the typical fiber loading for standard infrastructure repair?
A: For structural repair, bridge reinforcement, or shotcrete patch repairs, a fiber dosage of 1 percent to 2 percent fiber fraction is generally recommended to balance fluidity, pumpability, and crack resistance.
