PNE® ES-6660
Loose Hooked-End Steel Fiber
Steel Fibers for Concrete Reinforcement
Since 2002, we have specialized in concrete crack resistance, waterproofing, and anti-corrosion technologies.
High-Performance Loose Hooked-End Steel Fiber | PIONEER®
Steel Fibre Reinforcement Solution for Durable Concrete
What Is PIONEER® Loose Hooked-End Steel Fibre?
PIONEER® PNE® ES-6660 loose hooked-end steel fibers are non-glued, cold-drawn steel fibre reinforcements designed for SFRC and UHPC.
Unlike glued or bundled fibers, the loose end-hooked design delivers:
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Immediate dispersion during batching
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Superior anchorage & pull-out capacity
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Mechanical interlock through optimized hook geometry
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Reliable crack resistance in both early and hardened stage
This makes them ideal for:
industrial floors, tunnel shotcrete, pavements, precast segments, bridge decks, and warehouse slabs where high toughness and load transfer performance are required.
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Technical Specifications of Loose Hooked-End Steel Fibers
Discover how PIONEER® loose hooked-end steel fibers enhance SFRC and UHPC with superior durability and crack control:
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Material: High-tensile steel
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Type: Hooked-end, loose steel fibre
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Specific Gravity: 7.8 g/cm³
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Length: 50 mm, 60 mm (custom lengths available)
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Diameter: 0.9 mm
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Aspect Ratio: 40–60
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Tensile Strength: 1000–1360 MPa
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Modulus of Elasticity: 200 GPa
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Color: Metallic gray
These technical parameters define the high mechanical performance of PIONEER® loose hooked-end steel fibers in SFRC, UHPC, precast, and industrial concrete applications.
International Standards Compliance for Steel Fibre Reinforced Concrete
PIONEER® steel fibres comply with global standards to ensure consistent, reliable performance in steel fibre reinforced concrete:
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ASTM A820 – Standard Specification for Steel Fibers for Concrete Reinforcement
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ASTM C1116 – Standard Specification for Fiber-Reinforced Concrete and Shotcrete
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EN 14889-1:2006 – Fibres for Concrete, Part 1: Steel Fibres
All PIONEER® steel fibres—including loose hooked-end types—meet global SFRC compliance requirements, ensuring structural reliability and performance consistency in industrial, precast, and infrastructure applications.
Key Benefits of Using Loose Hooked-End Steel Fibre in Concrete
Unlock advanced concrete performance and cost-efficiency with PIONEER® steel fibre reinforcement:
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Superior Crack Control: Effectively manages plastic and drying shrinkage cracking in SFRC and UHPC.
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Enhanced Flexural Strength: Increases post-crack load capacity, impact resistance, and fatigue durability.
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Efficient Dispersion: Loose form ensures immediate, even distribution during batching without clumping.
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Reduces Rebar and Mesh Use: Simplifies construction workflows while saving labor and material costs.
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Durability in Harsh Environments: Corrosion-resistant steel fibres extend service life even under aggressive conditions.
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Compatible with High-Performance Concrete: Ideal for SFRC, UHPC, and shotcrete requiring high tensile and flexural reinforcement.
Fibers are evenly distributed
Heavy load tolerance
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Applications of Steel Fibre Reinforced Concrete
PIONEER® loose hooked-end steel fibres are widely used in demanding SFRC applications requiring high flexural toughness, impact resistance, and structural reliability:
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Industrial floors & heavy-duty warehouse slabs
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Shotcrete for tunnels, slopes, mines（loose steel fibers for tunnel shotcrete）
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Slab-on-ground & pavements
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Precast pipes, panels, tunnel segments
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Jointless floors, bridge decks & overlays
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UHPC/RPC members requiring high tensile reinforcement
Hong Kong-Zhuhai-Macao Bridge
Da Nang Pier, Vietnam
Hangzhou Olympic Center
Not sure how to choose the right fiber or dosage?
Our team can recommend a solution based on your project requirements.
Email us：sales@pioneerfibre.com
Usage Guidelines for Optimal Fibre Reinforcement
To achieve optimal performance in SFRC and UHPC, follow these guidelines:
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Dosage: 15–45 kg/m³ depending on required toughness and design loading
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Mixing: Add fibres after aggregates; mix 3–5 minutes for full dispersion
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Placement: Suitable for pumping, casting, spraying
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Finishing: Standard tools can be used; visible fibre tips do not affect performance
Custom Steel Fibre Solutions for Concrete Reinforcement
We offer customizable reinforcement solutions for SFRC & UHPC:
Lengths: Standard and custom lengths available to suit project needs.
Packaging:
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Water-soluble paper bags (5 kg, 10 kg) for direct addition into the mixer.
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Cardboard cartons for organized on-site handling.
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Bulk packaging options available based on project logistics.
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Why Choose Us?
Proven Expertise & Greater Savings
22 years of focus
on fiber reinforcement solutions.
5,000 tons yearly
from advanced manufacturing.
20+ countries served
with global product distribution.
1,000 projects proven
in diverse applications worldwide.
FAQ
The hooked-end geometry provides strong mechanical anchorage, allowing the fibers to effectively bridge microcracks as they form. This restricts crack width, increases flexural toughness, enhances residual strength, and helps the concrete maintain load-bearing capacity even after initial cracking.
Yes. Loose hooked-end steel fibers can be used as a complementary reinforcement system alongside welded wire mesh or rebar. When combined, the fibers provide distributed micro-crack control while the traditional reinforcement handles major structural loads. This hybrid system is common in slabs-on-ground, pavements, and tunnel linings to achieve improved toughness and reduced shrinkage cracking.
Loose steel fibers slightly reduce the slump of fresh concrete, but the effect is manageable by adjusting water-reducing admixtures. Because the fibers are not glued, they disperse quickly and do not significantly increase mixing resistance. Using a well-graded aggregate and a proper superplasticizer ensures smooth placement and finishing.
Distribution quality can be inspected through core sampling, section cutting, or CT scanning (for UHPC applications). A uniform fiber orientation and concentration indicate proper mixing.
Loose steel fibers are fully compatible with both pumping and spraying. Their free-dispersion nature minimizes clogging in pipelines and helps maintain steady flow during shotcrete application.
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Why Choose PIONEER® Technologies
Tested, Proven, and Engineered for Concrete Crack Control and Durability
Partner with a trusted leader in concrete crack control, fiber reinforcement, and crystalline waterproofing solutions for modern infrastructure and high-performance concrete systems.
1. Independently Tested and Certified
Validated through independent laboratory testing and compliant with ASTM standards and CE certification, PIONEER® technologies deliver reliable performance in fiber reinforced concrete and crystalline waterproofing applications.
2. Proven in Real Projects Worldwide
With applications in over 1,000 projects across 20+ countries, our systems have been used in major infrastructure such as the Hong Kong–Zhuhai–Macao Bridge, Bangladesh Subsea Tunnel, and metro systems, demonstrating consistent performance in demanding environments.
3. Integrated Reinforcement and Waterproofing Solutions
We provide advanced systems including macro synthetic fibers, micro fiber reinforcement, and crystalline waterproofing, supporting applications in industrial floors, precast concrete, ready-mix, and infrastructure projects.
4. Direct Manufacturer with Engineering Support
We offer dosage design, mix optimization, and on-site technical support, backed by over 24 years of experience, ensuring efficient implementation and consistent performance across large-scale construction projects.
26,500m² production base
Advanced fiber dispersibility
Exceptional tensile strength
