AF-PP-Fiber is a kind of high intensity bunchy monofilament fiber mainly made of PP by special technique, which can effectively prevent concrete microcrack, as well as improve concrete anti-crack, anti-infiltration, and anti-shock performance.
| Material | Polypropylene | Type | Bunchy monofilament |
| Color | White | Equivalent Diameter (μm) | 25-40 |
| Elongation at Break (%) | ≥15 | Density (g/cm3) | 0.91-0.93 |
| Modulus of Elasticity (MPa) | ≥3000 | Length (mm) | 3, 6, 10, 12, 15, 19, etc. |
| Tensile Strength (MPa) | ≥400 | Note: length range: 3-50 mm, customizable |
Putting AF-PP-fiber into the concrete or mortar can effectively prevent microcrack which is caused by temperature change, plastic and dry shrinkage. They are widely used in roads, bridges, underground waterproof projects and roofings, walls, pools, basements of the civil construction industry.
AF-Fiber distributes in the concrete in 3D, which reduces stress concentration of the microcrack point, weakens or removes the tension caused by sun crack of the concrete or mortar, further prevents the happening and development of microcrack.
The evenly distributed fiber monofilament forms a support system, prevents bleeding and aggregate settlement, reduces the porosity greatly, consequently reducing permeability of the concrete significantly.
AF-Fiber can effectively decrease stress concentration in the concrete caused by several times’ circulation of freezing and thawing, and prevents further extending of the microcrack.
AF-Fiber can help to absorb the kinetic energy, which is produced when components of concrete are impacted. Due to the anti-crack effect of fiber, when concrete is subjected to impact loading, fiber can prevent rapid extending of the internal crack, consequently increasing the toughness and impact resistance of the concrete.
The reduction of porosity can slow down the corrosion due to penetration of water, chloride ions, as well as other chemicals, thereby reducing damages to the concrete and improving concrete durability.
When the temperature in concrete raises above 165°C, the PP fiber monofilament mesh will melt, simultaneously producing inner link channels to help the high pressure steam escape from the concrete, consequently preventing bursting in fire.
