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Next-Generation Concrete Fiber
Without the Cost of Traditional High-End Fibers
Since 2002, we have specialized in concrete crack resistance, waterproofing, and anti-corrosion technologies.
Rimix™ NanoRebar High-Performance Concrete Fiber
High-Performance PAN Micro Synthetic Fiber for Dense Distributed Concrete Reinforcement
Rimix™ NanoRebar is a high-performance micro synthetic fiber manufactured from refined polyacrylonitrile (PAN). Its ultra-fine fiber diameter and high fiber count are designed to create dense, distributed micro-reinforcement throughout the concrete matrix.
What Is Rimix™ NanoRebar Concrete Fiber?
Rimix™ NanoRebar is a high-performance micro synthetic fiber made from refined polyacrylonitrile (PAN fiber), originally derived from carbon fiber precursor technology. It is designed for fiber reinforced concrete (FRC) applications, providing both early-stage crack control and long-term crack resistance.
Compared with traditional polypropylene fiber, NanoRebar offers significantly higher tensile strength and modulus, allowing it to work not only during the plastic stage, but also after concrete hardening.
By improving toughness and crack resistance, it helps reduce cracking, enhance durability, and improve overall performance in high-performance concrete (HPC) and ultra-high-performance concrete (UHPC).
Thanks to its ultra-fine diameter, NanoRebar delivers a higher fiber count at lower dosage, achieving more effective crack control with comparable overall cost to polypropylene fiber.
Next-Generation High-Performance Fiber
How NanoRebar Reinforces Concrete
Crack control in fiber reinforced concrete is governed by fiber spacing theory, proposed by Romualdi and Batson and widely referenced in ACI guidance. The theory states that crack resistance depends on reinforcement spacing: the closer the spacing, the higher the probability that cracks will be intercepted and restrained.
Rimix™ NanoRebar is designed based on this principle. Its ultra-fine PAN-based fibers provide a much higher fiber count per unit volume, resulting in closer spacing between reinforcement elements. This increases the likelihood that micro-cracks are intercepted early, reducing crack development throughout the concrete.
In addition, NanoRebar fibers have significantly higher tensile strength and elastic modulus than conventional polypropylene fiber, enabling effective crack bridging and stress transfer in both plastic and hardened stages. This results in improved crack resistance, enhanced toughness, and more reliable performance in concrete.
NanoRebar Fiber Reinforcement Inside Concrete
NanoRebar vs Polypropylene Fiber
Compared with conventional polypropylene microfiber, NanoRebar has different fiber dimensions and mechanical properties. Comparative performance should be established using product-specific testing at the proposed dosage rather than assumed from material properties alone.
Property
Polypropylene Fiber
Rimix™ NanoRebar
Typical Fiber Diameter
20–48 μm
≈ 11 μm
Tensile Strength
300–450 MPa
600–900 MPa
Elastic Modulus
3–3.5 GPa
7–10 GPa
Recommended Dosage
0.9 kg/m³
0.45 kg/m³
Fiber Count per m³
≈ 0.6–1.0 Billion
≈ 2.7 Billion
Why Choose Rimix™ NanoRebar for High-Performance Concrete?
High-performance concrete (HPC) requires effective crack control, durability, and long-term reliability. In modern fiber reinforced concrete (FRC) systems, fiber selection plays a critical role in achieving these properties.
Traditional high-performance fibers for concrete—such as PVA fiber, basalt fiber, AR glass fiber, aramid fiber, and carbon fiber—offer excellent mechanical performance, but are often limited by high cost and restricted use in UHPC or specialized applications.
Rimix™ NanoRebar, a next-generation micro synthetic fiber for concrete based on PAN fiber technology, is designed to bridge this gap.
It delivers effective crack control, improved toughness, and reliable durability in both standard concrete and high-performance concrete fiber reinforcement systems—without the cost limitations of traditional high-end fibers.
Lower dosage, more fibers, superior performance
Benefits of Rimix™ NanoRebar
Rimix™ NanoRebar enhances concrete performance through high fiber count and distributed micro-reinforcement, offering clear advantages over conventional polypropylene fibers.
1. More Effective Crack Control
At approximately half the dosage, Rimix™ NanoRebar provides several times more reinforcement elements. This increases the probability of intercepting micro-cracks early and reduces visible cracking in slabs and structural elements.
2. Full-Stage Crack Control
With higher tensile strength and modulus, Rimix™ NanoRebar remains effective in both the plastic and hardened stages of concrete. It helps control early shrinkage cracking as well as later-stage cracking caused by loading and drying shrinkage.
3. Improved Toughness and Structural Reliability
By enabling effective crack bridging, Rimix™ NanoRebar enhances concrete toughness and reduces brittle behavior. This improves performance under impact, repeated loading, and long-term service conditions.
4. Comparable Overall Cost
Despite improved reinforcement efficiency, Rimix™ NanoRebar achieves these benefits at a comparable cost per cubic meter. Lower dosage combined with higher effectiveness makes it a practical upgrade without increasing overall project cost.
High strength and high modulus fiber for concrete reinforcement
Standards & Compliance
Applicable technical references may include ASTM C1116/C1116M and EN 14889-2, subject to the supplied product grade, project requirements and current supporting documentation.
Applications of Rimix™ NanoRebar
Rimix™ NanoRebar is used in fiber reinforced concrete (FRC) applications requiring effective crack control and durability.
It is suitable for both standard concrete and HPC / UHPC systems.
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High-durability slabs, floors & pavements
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Precast concrete elements
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Industrial floors and heavy-traffic platforms
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Waterproof structures: basements, tanks, pools, tunnels
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Shotcrete for tunnels & underground work
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Infrastructure & Marine
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High-performance and ultra-high-performance concrete
How to Use Rimix™ NanoRebar
Rimix™ NanoRebar is available in multiple lengths and packaging options to suit different fiber reinforced concrete and shotcrete applications.
Lengths: 6 mm, 12 mm, 18 mm
Dosage：0.45–0.9 kg/m³
Packaging: Bulk loose fiber in ton bags or carton packaging (small packs in plastic or water-soluble bags)
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Why Choose Us?
Proven Expertise & Greater Savings
24 years of focus
on concrete protection solutions.
20+ patents & awards
In concrete durability technology
20+ countries served
with global product distribution.
1,000 projects proven
in diverse applications worldwide.
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
FAQ
NanoRebar can be evaluated as an alternative to conventional polypropylene microfiber where the project requires finer fiber distribution, different fiber mechanical properties, or different dosage-performance characteristics.
NanoRebar is not an unconditional replacement for welded wire mesh. In selected applications, it may be considered as an alternative to specific crack-control or secondary reinforcement when supported by project-specific engineering design, testing, and applicable requirements.
NanoRebar may be evaluated for selected UHPC and other high-performance cementitious systems.
Suitability depends on the matrix design, required tensile and post-crack behavior, fiber dosage, mixing conditions and project performance criteria. UHPC applications should therefore be verified by project-specific laboratory testing rather than assumed from fiber properties alone.
The current indicative range is 0.45–0.9 kg/m³.
The final dosage should be selected according to the concrete mixture, fiber length, required performance and applicable test results. Contact PIONEER® for project-specific dosage evaluation.
Selecting a high-performance concrete fiber requires more than comparing fiber strength alone.
Send us your concrete application, mix information, required performance and current reinforcement approach. PIONEER® can help you review the appropriate NanoRebar fiber length, dosage and available technical evidence.