Views: 0 Author: Site Editor Publish Time: 2025-09-24 Origin: Site
A concise, engineered reinforcement for concrete, macro synthetic fibres add post-crack strength and reduce surface cracking without the corrosion risks linked to steel. At Xinrui-Te, we provide high-performance macro synthetic fibers designed to improve concrete durability and service life in demanding environments. Understanding what these fibers are and how they work helps buyers, contractors, and engineers select the right reinforcement solution for their projects.
Macro synthetic fibres are structural synthetic fibers used in concrete to control cracking and enhance post-crack performance. Unlike microfibres, which are very fine and used mainly for early-age shrinkage control, macro fibres are larger in size and contribute to the structural toughness of concrete.
Typically longer than 30 mm, compared to microfibres that are often less than 20 mm.
Made from durable synthetic materials such as polypropylene.
Classified as structural fibres, providing measurable improvements in flexural strength and toughness.
Most macro synthetic fibers on the market, including Xinrui-Te products, are manufactured from 100% virgin polypropylene. They are commonly available in lengths between 40 mm and 60 mm, with diameters that allow them to perform as a genuine alternative to steel fibres in many applications.
Contractors often ask whether macro synthetic fibers “replace” rebar. The answer is more nuanced: while they cannot always serve as the sole reinforcement in load-bearing structural members, they often replace steel mesh or steel fibers in slabs, pavements, and sprayed concrete, reducing overall material costs and simplifying installation.
The role of macro synthetic fibers goes beyond simply mixing strands into concrete. Their effectiveness lies in how they interact with cracks, stresses, and shrinkage during the life of a concrete element.
When concrete cracks, embedded macro fibres act as tiny reinforcement bridges across the opening. They hold the crack faces together and provide residual strength even after cracking, which extends the service life of the structure.
Macro synthetic fibers distribute stress more evenly within the concrete matrix. Instead of a crack propagating quickly and causing failure, stresses are spread across many fibers, resulting in improved load-bearing capacity and ductility.
Both plastic shrinkage (which happens in the first hours after pouring) and drying shrinkage (over the longer term) are mitigated with macro fibers. By controlling the formation of microcracks, they reduce the chance of these evolving into visible, damaging cracks.
Picture a network of hundreds of embossed polypropylene fibers interlocking with concrete. As stress builds, each fiber grips the surrounding material and shares the load, slowing crack growth and maintaining the concrete’s integrity. This mechanism is especially valuable in slabs, tunnels, and shotcrete where surface cracks can compromise long-term durability.
When evaluating synthetic macro fiber options, buyers should consider not just the material but also the shape and bonding features.
Material: High-quality macro fibers are made from 100% virgin polypropylene, ensuring chemical stability and resistance to alkali attack.
Surface Design: Embossed or textured surfaces provide mechanical anchorage with concrete, enhancing crack resistance.
Shapes:
Twisted: Significantly enhances the tensile strength, durability, and resilience of the fibers.
Waved: Greatly increases the bulkiness, loft, and covering power of the yarn, improving
Embossed ：provide higher pull-out resistance, maximizing post-crack performance.
Xinrui-Te focuses on producing embossed macro fibers with excellent dispersion, strong binding force, and a surface texture that improves bonding within the concrete matrix. These features ensure reliable performance across a variety of structural applications.
For buyers, another important feature is dispersion behavior. Poor-quality fibers can clump or “ball” during mixing, creating weak spots. Xinrui-Te macro fibres are engineered for clean, even dispersion, ensuring consistent performance across every cubic meter of concrete.
Xinrui-Te’s macro synthetic fibers are engineered to combine strength, durability, and ease of use. Manufactured from 100% virgin polypropylene, they deliver reliable performance in diverse conditions, including aggressive coastal environments where steel fibers may corrode.
Feature | Xinrui-Te Macro Fibers |
Material | 100% Virgin Polypropylene |
Surface | Embossed for strong mechanical bond |
Strength | High breaking strength with excellent crack resistance |
Dispersion | Uniform mixing and strong binding force |
Applications | Cast-in-place, shotcrete, precast, coastal and marine projects |
By choosing Xinrui-Te, contractors benefit from macro fibers that maximize shrinkage resistance, reduce surface cracks, and improve tensile performance. These fibers are particularly suited for industrial floors, precast elements, and marine structures where corrosion resistance is critical.
Macro synthetic fibres have found widespread acceptance across the construction industry. Their versatility means they are chosen for both structural and durability-focused applications.
Cast-in-place slabs: To minimize cracking in industrial and commercial flooring.
Shotcrete applications: Especially in tunnels and rock stabilization, where high energy absorption is required.
Precast elements: For components such as panels, pipes, and culverts that need toughness and durability.
Coastal and marine structures: Their non-corrosive nature makes them superior to steel fibers in docks, seawalls, and harbors.
Industrial pavements: Offering enhanced load capacity for heavy traffic areas.
Another growing use is in infrastructure rehabilitation projects. In bridge decks or tunnel linings, macro fibers improve durability against freeze-thaw cycles, heavy traffic loads, and chemical attack. Their resilience reduces life-cycle maintenance costs, an important factor for public works and long-span structures.
Many buyers evaluate macro synthetic fibres alongside steel fibers or microfibres. Each option has advantages, but macro fibres strike a balance between performance and practicality.
Versus Steel Fibers: Macro synthetic fibres do not corrode, making them ideal for marine and de-icing salt environments. They are also lighter and easier to transport.
Versus Microfibres: Microfibres are excellent for early-age plastic shrinkage control but cannot deliver the same structural benefits as macro fibres.
Versus Mesh Reinforcement: Mesh can be labor-intensive to place, while macro fibres are simply mixed into the concrete, reducing installation time.
This combination of durability, crack control, and ease of placement makes macro fibres a preferred choice in modern concrete reinforcement strategies.
Correct specification is vital for realizing the full benefits of macro synthetic fibres.
Dosage Ranges: Typical dosages range between 3 kg/m³ and 9 kg/m³, depending on application. Project-specific data sheets should be referenced to confirm the required volume.
Mixing Tips: Add macro fibers slowly into the concrete mixer to ensure uniform distribution. Proper mixing time prevents clumping and ensures effective dispersion.
Pumpability: Macro fibers are designed to be pumpable, but equipment settings may need adjustment for longer fibers.
Finishing Considerations: While they may slightly influence surface finish, correct techniques minimize visible fibers. For exposed surfaces, additional surface treatments may be applied.
When to Use Steel Reinforcement: In structural elements requiring rebar for load-bearing, macro fibers are used as a complementary reinforcement rather than a total replacement.
It is also important to review compliance with project standards. Xinrui-Te macro fibres meet international certifications such as CE, SGS, and ISO, giving buyers confidence in their suitability for regulated construction markets.
Macro synthetic fibers are an effective, non-corrosive solution for enhancing concrete performance, offering crack control, post-crack strength, and long-term durability across a wide range of applications. Xinrui-Te supplies high-quality polypropylene macro fibres with proven strength, dispersion, and bonding features, making them suitable for demanding projects from industrial flooring to marine structures. For more details, technical support, or to request a data sheet, please contact us today.
