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.
Applicable standards and test methods
PIONEER® steel fibers are developed with reference to internationally recognized standards for steel fiber products and fiber-reinforced concrete. Applicable standards and documentation depend on the product grade, intended application, project requirements, and destination market.
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ASTM A820/A820M — Standard Specification for Steel Fibers for Fiber-Reinforced Concrete
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ASTM C1116/C1116M — Standard Specification for Fiber-Reinforced Concrete
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EN 14889-1:2006 — Fibres for Concrete — Part 1: Steel Fibres — Definitions, Specifications and Conformity
These standards provide technical references for steel fiber selection and use in precast concrete, industrial floors, shotcrete, and other fiber-reinforced concrete applications. Product suitability should be confirmed according to the project design, required performance, and applicable local regulations.
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 Demanding Environments: Mechanically anchored steel fibres maintain matrix integrity, protecting reinforced concrete structures from aggressive environmental degradation and extending service life.
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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
24 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
PNE® ES-6660 is a loose, non-glued hooked-end steel fiber for fiber-reinforced concrete. It is supplied as individual steel fibers rather than bonded bundles.
Both use hooked-end geometry, but their supply formats differ. PNE® ES-6660 is supplied as loose individual fibers, while a product such as PNE® GS-6060 is supplied in glued bundles. Final selection should consider product specifications, batching requirements, concrete mix and required performance.
Fibers crossing a crack plane can contribute to crack bridging and post-crack load transfer. Actual residual performance depends on fiber dimensions, dosage, concrete mix and the applicable test method.
Final dosage should follow the current PNE® ES-6660 TDS and should be selected according to the concrete application, required performance, test method and project design.
Yes, it may be used together with conventional reinforcement where specified. Any reduction or substitution of mesh or rebar should be supported by project design, performance evidence and applicable approvals.
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Why Choose PIONEER® Technologies
Certified Technical Data
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Proven Global Experience
Trusted worldwide for high-performance concrete fiber reinforcement across industrial, commercial, and infrastructure projects.
Broad Micro Fiber Range
Complete micro synthetic fiber portfolio—including monofilament, fibrillated, ultra-fine, self-dispersing, and polyester fibers for shrinkage crack control.
Expert Dosage & Engineering Support
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26,500m² production base
Advanced fiber dispersibility
Exceptional tensile strength
