Concrete fiber, commonly used as polypropylene resin, is specially used for plastic anti-cracking fiber in cement concrete, can prevent or reduce the initial plastic crack of cement concrete, and can be used as the “secondary rib” of cement concrete. .
Concrete fiber is prepared by adding modified masterbatch to polypropylene chips for blending, spinning and stretching. The special anti-static and anti-ultraviolet treatment of the concrete fiber makes the fiber evenly dispersed in the concrete and can exert its effect for a long time; the "Y" cross section of the fiber increases the surface area of the fiber; the "Xinsiwei" brand fiber undergoes chemical and physical modification. The treatment has a rough surface and greatly improves the bonding force between the fiber and the cement-based aggregate. Concrete fiber can improve the performance of concrete by reducing the occurrence and quantity of primary cracks in concrete. It does not have any conflicts and chemical reactions with concrete aggregates, admixtures, admixtures and cements, so it has good adaptability to concrete materials.
In the hardening process of cement concrete, the hydration of cement and water reacts to cause the shrinkage of concrete volume. In the later stage, due to the evaporation of free moisture in the concrete, the shrinkage stress exceeds the tensile strength of the cement matrix and will be generated inside the concrete. Micro cracks. The development of micro-cracks is about 70% in the 3-7d gel period, when the tensile strength of concrete is less than 1MPa. After adding "Xinsiwei" brand fiber to the concrete, the fiber can be easily and quickly dispersed evenly in the concrete to form a chaotic support system, dispersing the directional stress of the concrete, preventing the occurrence and development of the primary crack in the concrete, eliminating or reducing The number and scale of primary micro-cracks greatly improve the anti-cracking and impermeability of concrete and improve the toughness of concrete, thus prolonging the service life of concrete. In addition, since the fiber itself has a certain strength, the fiber is uniformly dispersed in the concrete and forms an anchoring action, which can absorb a certain breaking energy in an instant.
●Main technical parameters:
Material: 100% polypropylene
Moisture absorption rate: <0.1%
Fiber shape: bundled monofilament
Fiber specifications: 3, 6, 9, 12, 18mm
Elongation at break: 15%-20%
Section shape: O type or Y type
Fiber diameter: 18-45um
Melting point: 165-175
Flash point: 590 ° C
Water absorption: none
Safety: Safe and non-toxic
Acid and alkali resistance: extremely high
Superior performance editor
● Improve impermeability;
● Improve antifreeze performance;
● Improve impact resistance and wear resistance;
● Improve toughness;
● Improve crack resistance;
● Increase the fire resistance of concrete and improve the anti-explosion function;
● Improve the quality of concrete products. 
(1) good dispersibility and strong grip;
(2) High acid and alkali resistance, high radiation resistance;
(3) Anti-freezing and anti-corrosion, strengthening and toughening;
(4) Physical reinforcement, anti-cracking and strengthening;
(5) stable performance, safe and non-toxic;
(6) Simple construction and economical and reliable;
The use of polypropylene fibers generally does not require changes to the original design mix ratio, nor does it replace the original design of the stressed steel bars. The amount of concrete per cubic meter of concrete is 0.6kg-1.2kg, and the recommended dosage is 0.9kg per cubic meter of concrete. The fiber is added after adding dry material (sand, cement, etc.) before adding water. The mixing time is slightly longer than the mixing time of the fiber-added concrete for 30-60 seconds.
●Adjustment of slump:
The addition of fibers may increase the consistency of the mix and cause a slight decrease in slump. The slump is adjusted by experiment before use.
● Strength test:
It has been verified by experiments that the addition of fibers does not affect the original design strength.
●Receiving pressure surface:
The addition of fiber will not affect the surface. When using the steel, it should use steel or iron trowel. If the wooden trowel is not smooth enough, the fiber will be hooked out.
●Forming and curing:
Concrete incorporating fiber has no special requirements during molding and can be cured according to normal concrete. Standard packaging: 20 kg / bag (20 sachets)