PP Twist Bunchy Fiber for Emerging Industrial Concrete Construction

PP Twist Bunchy Fiber For Emerging Industrial Concrete Construction

PP twisted bunchy fiber beam forming is a kind of concrete additive, using polyolefin as raw material, its rough surface is processed by special parallel thread extrusion and twisting process.
The pp twisted bunchy fiber is often used to insted of steel fiber, and improve the strength

High fracture strength, Good dispersion and strong binding force
1. PP twisted bunchy fiber can prevent the phenomenon of concrete shrinkage cracks. Because the elastic modulus of pp twisted bunchy fiber is lower than that of concrete hardening, the improvement of crack resistance of concrete is limited, but the toughness of concrete is still improved to a certain extent.

2. PP twisted bunchy fiber can improve the fire resistance of the concrete, at high temperatures, will form a lot of holes in the concrete, so that the water is discharged along the hole, but also to avoid the formation of water vaporization, greatly improve the fire resistance time and grade.

3. PP twisted bunchy fiber has the characteristics of small diameter, large surface area, good dispersion in cement-based materials, acid, alkali, salt and other chemical corrosion resistance, high melting point, non-toxic and so on. The pp twisted bunchy fiber can be widely used to improve the impermeability and crack resistance of mortar, ordinary concrete and high performance concrete, and can also significantly improve the frost resistance, fire resistance, impact resistance, wear resistance and workability of concrete. It mainly changes the physical properties of concrete, and has good compatibility with cement, coarse aggregate and other admixtures.

4. PP twisted bunchy fiber can effectively improve the impact toughness of concrete, the ability to absorb impact energy after initial cracking, extend the fatigue life of concrete, and improve the stiffness retention ability of concrete during fatigue. This characteristic makes polypropylene fiber concrete suitable for pavement and bridge deck engineering.

5. PP twisted bunchy fiber is a kind of high-performance fiber dedicated to concrete/mortar, which can effectively control the concrete/mortar plastic shrinkage, dry shrinkage, temperature change and other factors caused by micro cracks, prevent and inhibit the formation and development of concrete primary cracks, greatly improve the concrete/mortar crack resistance, anti-seepage performance, impact wear performance, increase the toughness of concrete. Thus improve the service life of concrete.

1. PP twisted bunchy fiber mixing ratio: It is generally recommended that the concrete content per square meter should be more than 2.7kg (volume ratio 0.3%), and the reinforcement should be 5.5kg
2. PP twisted bunchy fiber length: The usual crack resistance requires a fiber length of 54mm
3.PP twisted bunchy fiber mix ratio: The proportion of concrete usually does not change, in order to crack resistance requirements, it is recommended that the polymer fiber and PP fiber mesh in the form of 1:1 volume ratio (per square meter of cement concrete 0.9kg fiber mesh) used in combination.

4. PP twisted bunchy fiber use: dual axis horizontal forced mixer preferred.

5. PP twisted bunchy fiber mixing process: the gravel, fiber, sand in turn into the blender. After the fiber is fully developed, add cement and water and stir normally. The added material can be added in the same way as ordinary concrete, but the mixing time needs to be extended appropriately to ensure that the fibers are fully mixed.
6. PP twisted bunchy fiber styling and maintenance: no special requirements, can be 30 seconds along the vibration time, the maintenance method is the same with ordinary concrete.

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