NanoRebar Technology
Dense Distributed Reinforcement
Using ultra-fine high-strength micro fibers
Since 2002, we have specialized in concrete crack resistance, waterproofing, and anti-corrosion technologies.
How Rimix™ NanoRebar Works
Dense Distributed Micro Reinforcement for Concrete
Why Conventional Reinforcement Falls Short
Concrete cracking remains a persistent challenge in structural engineering. Conventional crack-control solutions such as polypropylene fibers and welded wire mesh can improve performance, yet their effectiveness is limited because reinforcement is not uniformly distributed throughout the concrete matrix.
Polypropylene fibers disperse within the concrete but provide limited stiffness after hardening. Welded wire mesh offers higher stiffness but exists only in a single horizontal plane, leaving most of the concrete volume unreinforced. Cracks can therefore still initiate and propagate through areas without effective reinforcement.
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Introducing Dense Distributed Micro Reinforcement
Rimix™ NanoRebar introduces dense distributed micro reinforcement, a new approach that places a large number of micro reinforcement elements throughout the concrete matrix.
Using ultra-fine high-strength micro fibers, NanoRebar forms a dense three-dimensional reinforcement network that significantly reduces reinforcement spacing and improves crack resistance, structural toughness, and overall concrete performance.
Rimix™ NanoRebar transforms conventional localized reinforcement into a dense distributed micro-reinforcement system within the concrete volume.
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How NanoRebar Reinforces Concrete
When Rimix™ NanoRebar is mixed into concrete, ultra-fine micro fibers disperse throughout the cement matrix and create a dense network of micro reinforcement elements across the concrete volume.
Because reinforcement spacing is greatly reduced, developing cracks are far more likely to encounter reinforcement elements and be restrained at an early stage.
NanoRebar fibers also possess significantly higher tensile strength and elastic modulus than conventional polypropylene fibers, enabling them to bridge cracks and transfer tensile stresses effectively.
Through the combined effects of dense distributed reinforcement and efficient crack bridging, Rimix™ NanoRebar improves crack resistance, toughness, and structural performance in both the plastic and hardened stages of concrete.
Theoretical Basis: Fiber Spacing Theory
The theoretical basis of Rimix™ NanoRebar is fiber spacing theory, proposed by American researchers Romualdi and Batson in the 1960s and widely referenced in guidance from the American Concrete Institute (ACI).
The theory states that crack resistance in fiber-reinforced concrete largely depends on the average spacing between reinforcement elements.
When fibers are finer and more numerous, reinforcement spacing becomes smaller, increasing the likelihood that developing cracks will encounter reinforcement and be restrained.
By introducing a large number of ultra-fine fibers, Rimix™ NanoRebar forms a dense reinforcement network that significantly reduces reinforcement spacing and improves crack interception throughout the material.
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Material Performance Comparison
The effectiveness of fiber reinforcement depends on two factors:
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fiber mechanical properties
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reinforcement spacing within the concrete matrix
Rimix™ NanoRebar utilizes ultra-fine polyacrylonitrile (PAN) micro fibers, a high-strength synthetic fiber widely used as the precursor material for carbon fiber.
Compared with conventional polypropylene fibers used in concrete, polyacrylonitrile fibers offer significantly higher tensile strength, higher elastic modulus, and much finer diameter. These properties allow PAN micro fibers to function as high-efficiency micro reinforcement elements inside the concrete matrix.
Because a much larger number of PAN fibers can be distributed within each cubic meter of concrete, reinforcement spacing becomes significantly smaller, which greatly improves crack interception and crack control performance.
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
With 50% lower dosage, Rimix™ NanoRebar introduces 3–4 times more reinforcement elements per cubic meter, forming a much denser reinforcement network.
Laboratory Verification of Rimix™ NanoRebar
Independent laboratory testing compared Rimix™ NanoRebar with conventional polypropylene fiber reinforcement.
1. Crack Control
Mortar Type
Total Crack Area (mm²)
Crack Reduction (%)
Reference Mortar
1412.7
—
Polypropylene Fiber
415.3
70.6
Rimix™ NanoRebar
106.5
92.5
With 50% lower dosage, Rimix™ NanoRebar achieved 31% stronger crack control than polypropylene fibers.
2. Flexural Toughness
Concrete Type
Toughness Ratio Re
Improvement (%)
Reference Concrete
0.37
—
Polypropylene Fiber
1.57
324
Rimix™ NanoRebar
2.85
670
Compared with polypropylene fiber reinforcement, Rimix™ NanoRebar increases the flexural toughness ratio by 346%, significantly improving post-crack load capacity.
Engineering Value of Rimix™ NanoRebar
Rimix™ NanoRebar introduces a dense distributed reinforcement mechanism within the concrete matrix, transforming conventional localized reinforcement into a three-dimensional reinforcement system.
1. For Contractors
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Replace conventional polypropylene crack-control fibers
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Reduce or replace welded wire mesh
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Eliminate mesh placement and tying work
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Shorten construction schedules and improve efficiency
2. For Engineers and Designers
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Provide crack control in both plastic and hardened concrete
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Improve toughness and post-crack load capacity
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Enhance impact resistance and structural performance
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Enable higher-performance and more durable concrete structures
3. For Owners and Developers
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Improve long-term durability and structural reliability
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Reduce maintenance caused by cracking
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Extend the service life of concrete structures
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Achieve higher performance at a cost comparable to polypropylene fiber reinforcement
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An advanced micro synthetic fiber engineered for fiber-reinforced concrete (FRC), delivering optimized performance for modern high-performance concrete applications.
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Upgrade Your Polypropylene Fiber Today
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Contact Rimix™ NanoRebar Expert
-
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-
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Why Choose Us?
Proven Expertise & Greater Savings
22 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.
FAQ
Polyacrylonitrile fiber, commonly known as PAN fiber, is a high-performance synthetic polymer fiber. It is best known as the primary precursor material used in carbon fiber production, but ultra-fine PAN fibers can also be used as micro reinforcement fibers in concrete and cementitious materials.
Because PAN fibers possess higher strength and modulus than polypropylene fibers, they can provide more effective crack control in advanced fiber-reinforced concrete systems.
Rimix™ NanoRebar uses ultra-fine high-strength PAN micro fibers with significantly higher tensile strength and elastic modulus than conventional polypropylene fibers. The finer diameter allows billions of reinforcement elements to be distributed throughout the concrete.
Fiber spacing theory states that crack control effectiveness depends largely on the average spacing between reinforcement elements. Smaller spacing increases the likelihood that cracks will encounter reinforcement and be restrained.
In many applications, NanoRebar can reduce or partially replace welded wire mesh used for crack control, simplifying construction and improving efficiency.
Typical recommended dosage for Rimix™ NanoRebar is approximately 0.45 kg/m³, significantly lower than conventional polypropylene fiber reinforcement.
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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
