Polypropylene coarse fibers, also known as plastic steel fibers or imitation steel fibers, are a type of novel polymer material widely used in the construction industry, particularly for enhancing the performance of concrete, mortar, and other building materials. These fibers are primarily made from polypropylene and polyethylene as raw materials and are refined through a specialized production process to ensure they possess high strength, durability, and excellent engineering properties. The surface of polypropylene coarse fibers is rough, with a distinct shape, which effectively enhances their adhesion to the matrix material, thus improving the overall performance of concrete or mortar.
The density of these fibers is approximately 0.91 g/cm³, and they exhibit good compatibility with building materials such as concrete, enabling them to integrate well with the concrete mix. This integration improves the concrete's crack resistance and impact resistance. Additionally, polypropylene coarse fibers have high heat resistance, with a melting point of up to 170°C, allowing them to maintain good physical properties even in high-temperature environments. This makes them suitable for use in projects that require high-temperature performance.
The diameter of polypropylene coarse fibers is typically around 0.8 mm, and the length can be adjusted according to specific project requirements, usually ranging from 25 mm to 60 mm. The length and diameter of the fibers directly affect their reinforcement effect; longer fibers provide better mechanical properties, while shorter fibers are more convenient for construction.
The application of polypropylene coarse fibers during construction is relatively simple. Typically, the fibers are added to the mixer along with aggregates such as sand and gravel, and mixed with water to form a wet mix. It is important to ensure that the fibers are evenly dispersed throughout the concrete during the mixing process to achieve the desired reinforcement effect. Due to the thickening effect of the fibers, the viscosity of the concrete may increase, so adjustments to the slump may be necessary according to the project's requirements to ensure the workability and performance of the concrete.
|
Material |
Virgin Homopolymer Polypropylene 100% |
|
Fiber Equivalent Diameter |
0.8 to 1.8 mm |
|
Fiber Length |
30 to 65 mm, length can be cutomized |
|
Tensile Strength |
>400 MPa |
|
Elastic Modulus |
>10 GPa |
|
Density |
0.91 g/cm3 |
|
Dosage |
3 to 6 kg/cubic meter of concrete shotcrete |
|
Acid / alkali resistance |
High |
|
Water absorption |
Nil |