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Sheared steel fiber, also known as cold-rolled steel strip sheared steel fiber, is made by high-precision lengthwise and cross-cutting of thin cold-rolled steel strips (0.3–1.2 mm thick). These short steel fibers often have notches, ripples, or hooked ends to improve anchorage and bond with concrete—ideal when you need strong concrete reinforcement.
These high-performance fibers feature:
◆ Enhanced tensile strength (≥500 MPa)
◆ Optimized aspect ratios (L/D:20-100)
◆ Superior concrete adhesion
◆ Custom copper coating available
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Dimensions (L×Φ) | 20-60 mm × 0.3-1.2 mm | Buckling Resistance | ≥3 test cycles |
| Aspect Ratio (L/D) | 20-100 | Anchor Height | 1.5-2.0 mm surface profiling |
| Tensile Strength | ≥500 MPa | Density | 7.85 g/cm³ (0.00785 g/mm³) |
◆ Cold-working process ensures dimensional consistency
◆ Mechanical anchoring through deformed surface geometry
◆ 450-600 fibers per kilogram (standard size calculation)
◆ Compatible with concrete grades up to C80
Feeding order: Mix sand, aggregates, and cement first, then add sheared steel fiber. Never dry mix directly to avoid fiber clumping.
Mixing time: Extend mixing time by 30 to 60 seconds compared with normal concrete, to ensure even fiber distribution.
Pour the mixed concrete right away. Do not leave it standing for too long.
1. Shotcrete (Tunnel, Slope, Foundation Pit)
Common shotcrete thickness: 80mm, 100mm, 120mm, 150mm
80mm thickness: Max allowable length ≈ 53mm. Recommended size: 30mm / 35mm for low rebound and anti-blockage performance.
100mm thickness: Max allowable length ≈ 67mm. Main selection: 30mm / 35mm.
120mm thickness: Max allowable length = 80mm. Regular selection: 30~40mm.
150mm thickness: Max allowable length = 100mm. Recommended size: 35~40mm.
Supplement
For thin shotcrete (thickness < 60mm): Only use fibers ≤ 25mm to prevent fiber exposure and surface particle falling.
2. Cast-in-place Concrete (Floor, Bridge, Structural Members)
Floor & surface layer (100~150mm thickness): Recommended fiber length: 30~35mm.
Thick components, beams & piers (thickness> 150 mm): Choose 35~40mm. 40mm is ideal for high-stress structures.
Ultra-thin surface layer (thickness < 80 mm): Fiber length shall be limited to 25~30mm.
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