Indeal Replacement for Traditional Steel Fiber in Shotcrete

In modern underground construction and geotechnical engineering, polypropylene (PP) macro synthetic fibers have emerged as a high-performance, cost-effective replacement for traditional steel fibers in shotcrete applications.

While steel fibers provide good post-crack load capacity, they present notable drawbacks: high susceptibility to corrosion in humid environments, heavy self-weight, severe wear on pumping equipment, and safety hazards to operators during spraying.

In contrast, PP macro fibers offer superior engineering and operational advantages:

◆100% Rust-Proof & Corrosion-Resistant: Completely immune to acid, alkali, and moisture corrosion, preventing concrete spalling and significantly extending structural service life.

◆Lightweight & Easy Dispersal: With a density about one-seventh that of steel, macro PP fibers are easy to handle and disperse uniformly in the mix without balling, nozzle clogs, or excessive equipment abrasion.

◆Lower Rebound & Enhanced Ductility: Engineered surface embossing ensures strong mechanical interlock with the concrete matrix, effectively controlling shrinkage cracking while substantially reducing rebound rates during shotcreting—cutting material waste and labor costs.

PP macro fiber reinforced shotcrete is widely utilized in:

◆Tunneling & Mining: Primary and permanent rock support linings.

◆Slope Stabilization & Excavation: Soil nailing and rockfall protection.

◆Marine & Water Conservancy: Hydro-structures requiring high durability against moisture ingress.

By delivering unmatched durability, enhanced site safety, and superior spraying efficiency, polypropylene macro fibers are setting a new standard for modern shotcrete reinforcement.