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UCR Macro Synthetic Fiber
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UCR Macro Synthetic Fiber

UCR Macro Synthetic Fiber is a type of macro synthetic fiber, typically made from crimped polypropylene, used for reinforcing concrete. This fiber enhances the toughness, energy absorption, crack control, and durability of concrete, serving as a replacement for or supplement to traditional steel reinforcement.

Macro Synthetic Fibers are classified into three types as follows:

  1. Micro Synthetic Fibers:
     Provide secondary reinforcement; short and fine fibers used to control plastic shrinkage cracking.
     Dosage: 0.6–0.9 kg/m³
  2. Macro Synthetic Fibers:
     Longer and thicker fibers used to control shrinkage cracks and partially replace structural reinforcement steel.
     Dosage: Determined according to technical requirements and calculation formulas (1.5–10 kg/m³)
Property Specification
Material Polypropylene / Polyethylene blend
Density 0.92
Typical dosage 1.5–10 kg/m³
Length 51 mm
Length / Diameter ratio 74
Tensile strength 600–650 MPa
Elastic modulus (according to EN 14889.2) 9.5 GPa
Melting point 160°C
Electrical and thermal conductivity Low
Water absorption Almost negligible
Alkali resistance Excellent
Color White
Number of fibers per kg 59
  1. Steel Fibers:
     Longer and larger fibers used in structural applications with high load-bearing requirements.
     Dosage: Determined according to technical requirements and calculation formulas, up to 60 kg/m³

Outstanding Features:

  • Serve as a substitute for secondary reinforcement, controlling plastic shrinkage caused by temperature variations

  • Provide greater toughness and impact resistance

  • Improve the flexural strength of concrete

  • Reduce water permeability and enhance waterproofing performance

  • Suitable for areas requiring non-metallic materials

  • Corrosion-resistant, non-rusting

  • Lighter than steel fibers and used in smaller quantities

  • Reduce material wastage, saving cost and construction time

Lower carbon emissions