Writer： admin Time：2025-02-27 15:26 Browse：
Synthetic macro fiber reinforced precast concrete segments are prefabricated parts with modified polypropylene macrofibers as reinforcement materials. They are the main load-bearing components of subways, tunnels, and underground pipe galleries. The quality of their diameter affects the durability and safety of engineering structures. In the past, tunnel precast concrete segments mainly used steel bars and iron wires as reinforcement materials, but due to the poor alkali resistance of the materials, they were easily corroded, affecting the life of the product. With the research and development of synthetic fibers, synthetic macro fiber reinforced concrete segments have been continuously promoted and used in practice. Synthetic macro fibers have excellent alkali resistance, high strength and good anti-stripping performance. Using synthetic macro fiber reinforced concrete segments can not only reduce the weight of the product, but also extend its service life.
Features of synthetic macro fiber reinforced concrete segments:
1. The product has good crack resistance. The macro fibers are arranged in a 3D system in the concrete, which can effectively enhance the crack resistance of the concrete segments, reduce the penetration of moisture and carbon dioxide gas into the pipe segments, and reduce corrosion.
2. The addition of synthetic macro fiber enhances the impact resistance and creep resistance of the pipe segment;
3. Synthetic macro fiber is made of olefin materials with low melting point. When it encounters a fire, it can melt quickly, forming a porous structure inside the pipe segment, effectively releasing internal pressure and reducing the collapse caused by expansion.
4. Synthetic macro fiber is more convenient to use. It can be used at the mixing station site or added at the project site. It is also convenient to transport and reduce operating costs.
The synthetic macro Fiber-reinforced concrete segments can not only improve the product's crack resistance and shrinkage resistance, but also improve the product's corrosion resistance, and also reduce economic costs and durability. In the future, it will have a broader application prospect in subways, tunnels, submarine tunnels and other projects.
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