Polypropylene Imitation Steel Wire Fiber

Product introduction

Polypropylene imitation steel wire fibers are made from modified polypropylene, with a diameter of 0.22 mm and lengths selectable from 6, 8, 10, or 12 mm. They can replace copper-coated steel fibers in UHPC. Through a special treatment process, an active interface is formed on the fiber surface, providing strong bonding with the cement matrix.

These fibers feature high tensile strength and elastic modulus, effectively controlling UHPC drying shrinkage and thermal cracking, while enhancing impact resistance and durability. They have excellent dispersibility without agglomeration, are compatible with UHPC fine aggregate systems, and offer alkali resistance, corrosion protection, and safe handling. Overall, they provide a lower-cost solution.

Technical specifications

Executive standard GB/T21120-2018 Synthetic fibers for cement concrete and mortar

Texture of material	Polypropylene	Security	Non-toxic
Fiber diameter	0.18-0.2mm	Elastic modulus	≥3.5Gpa
Elongation at break	15-30%	Water absorption	Not absorbing water
Length	6-12mm	Acid and alkali resistance	Retention rate ≥95%
Tensile strength	≥450Mpa	Elongation at break	Uniformly dispersed without merging or clumping

Application area

1. UHPC components: Used in UHPC precast slabs and segmental linings, replacing copper-coated steel fibers to improve crack resistance and toughness.
2. High-speed railway RPC components: Suitable for high-speed rail track slabs and RPC cover slabs, enhancing durability and fatigue resistance.
3. Bridge engineering: Incorporated into UHPC bridge deck pavements to improve impact resistance, impermeability, and extend service life.
4. Ports and docks: Used in breakwaters and yard UHPC to resist seawater corrosion and enhance load-bearing and scour resistance.
5. Water conservancy projects: Added to dam and sluice UHPC to improve impermeability, crack resistance, and resistance to water erosion.
6. Industrial floors: Applied in heavy-duty workshop and explosion-proof UHPC floors to enhance impact resistance, wear resistance, and crack control.

Construction suggestions

• UHPC/RPC concrete: Dosage 4–6 kg/m³; replaces copper-coated steel fibers to improve crack resistance and toughness, suitable for precast components and bridge deck pavements.
• Shotcrete / thin-layer concrete: Dosage 3–5 kg/m³; used for tunnel initial support and thin-walled elements to reduce rebound and enhance impermeability and impact resistance.
• Heavy-duty industrial floor concrete: Dosage 3–4 kg/m³; suitable for heavy-load workshops and port yard slabs, improving wear resistance, crack control, and fatigue performance.