Polypropylene Fiber for Concrete Anti-Cracking
CAS Number: 9003-07-0
Polypropylene (PP) micro-fiber reinforcement is a synthetic fiber added to concrete and mortar to control plastic shrinkage cracking, enhance toughness, and improve impact resistance. The three-dimensional random distribution of fibers bridges micro-cracks before they can propagate, significantly reducing crack width and frequency. It is available in monofilament and fibrillated forms, with lengths from 6 to 54 mm.
Technical Specifications
| appearance | White fibrous material |
| fiber length (mm) | 6–54 (customizable) |
| melting point (°C) | 160–170 |
| tensile strength (MPa) | ≥350 |
| elongation at break (%) | 15–25 |
Applications
- Industrial and warehouse concrete floor slabs
- Shotcrete in tunnel lining and slope protection
- Precast concrete products and panels
- Concrete roads and airport runways
- Fire-resistant concrete (spalling prevention)
Key Features
- Three-dimensional crack-arresting effect reduces crack frequency and width
- Prevents plastic shrinkage cracking during early-age concrete
- Enhances fire resistance by melting to create vapor-escape channels
- Chemically inert, will not corrode or react with concrete
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