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High-Rise Building Slabs Enhanced with PAN Fiber

Updated: Nov 17, 2025

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       •      Type: 4-minute read

       •      Audience: Construction professionals, engineers, architects, contractors


Close-up of PAN fibers used in high-rise concrete slabs to enhance crack resistance, shrinkage control, and long-term durability.

Introduction: Meeting the Load-Bearing Demands of Vertical Construction


Modern high-rise buildings require reinforced concrete slabs that resist cracking, shrinkage, and long-term deformation. PAN fiber (polyacrylonitrile fiber) is emerging as a critical material to enhance the structural integrity and performance of concrete slabs in skyscrapers. With high tensile strength and modulus, PAN fiber improves both the early-stage and long-term durability of concrete floors in tall structures.


Why PAN Fiber Works for High-Rise Concrete Slabs


Concrete slabs in high-rise buildings must endure dead loads, dynamic human activities, and long-term settlement. PAN fiber contributes:

  • Crack control during shrinkage, hydration, and drying cycles

  • High elastic modulus (7–10 GPa) for improved stiffness and structural stability

  • Excellent bonding with cement paste, reducing microcracking at the fiber–matrix interface

  • Superior chemical and thermal resistance, essential for fire safety and long-term durability

Compared to traditional PP (polypropylene) fibers, PAN fiber offers better mechanical performance and thermal tolerance, especially for thick, load-bearing slabs.


Performance Metrics that Matter

Property

PAN Fiber

Typical PP Fiber

Tensile Strength

500–900 MPa

~300 MPa

Elastic Modulus

7–10 GPa

~3–5 GPa

Melt Point

>220°C

~165°C

Fiber Diameter

~13 µm

20–48 µm

Crack Resistance

High (micro + macro)

Primarily plastic shrinkage

These figures highlight why PAN fiber is more suited to critical vertical load-bearing systems such as high-rise slabs.

PAN Fiber Application in Construction Workflow

  • Mixing: PAN fiber blends uniformly with standard concrete mixes

  • Placement: Does not affect pumpability or finishing characteristics

  • Curing: Promotes stable hydration by controlling early shrinkage

  • Compliance: Meets ASTM C1116 and EN 14889-2 for synthetic fiber reinforcement

Construction companies in Asia, the Middle East, and Europe are increasingly incorporating


Conclusion: PAN Fiber Strengthens the Foundations of Vertical Growth


As cities grow taller, PAN fiber provides a high-performance, code-compliant solution for building slabs in high-rise towers. Its strength, stiffness, and resistance properties ensure safer, more durable concrete floors capable of supporting the weight of modern living and working spaces.


Explore PIONEER’s range of concrete reinforcement fibers and how they improve concrete properties. Visit our website: www.pioneerfibre.com

Micro fiber >> Learn More

Macro fiber >> Learn More

Steel fiber >> Learn More

Asphalt fiber >> Learn More

Contact us today to request samples, technical data, or a custom solution for your project.

WhatsApp: +1 (929) 569-9989 | +86 151-6240-5106

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