[what is monofilament polypropylene fiber?]
It is a kind of high-strength polypropylene bundle filament fiber with special surface treatment technology to ensure that the fiber has excellent dispersion in concrete and the grip of cement body. It is commonly used in fine stone concrete.
Concrete fiber (concrete is recommended to use 12-19mm concrete special fiber strength to resist cracking.
Tensile strength of 500mpa is 15 to 25% elastic modulus > 3800mp
1. Effectively improve the anti-cracking ability of mortar and concrete. Experimental results show that compared with ordinary mortar/concrete, the anti-cracking ability of slurry/concrete can be increased by 70% by adding 0.1% (0.9kg/m3) of monofilament fiber.
2. Greatly improve the anti-seepage performance of concrete. 0.9kg/m3 mixed polypropylene fiber reinforced concrete is 60% ~ 70% more resistant to permeability than plain concrete.
3. Significantly improve the impact resistance and wear resistance of concrete. Polypropylene fiber while low stiffness, load transferring ability is poor, but it can absorb the impact energy, reduce the cracks, enhance continuity medium material, reduces the local stress concentration phenomenon caused by the shock wave is blocked, thus can greatly improve the shock resistance and toughness of concrete.
4. Improve the anti-freeze performance of concrete. Adding polypropylene fiber in concrete can reduce the internal stress of concrete caused by temperature change, and prevent the expansion of temperature crack. At the same time, the improvement of anti-seepage capacity of concrete is also beneficial to the improvement of frost resistance. Both practice and research show that the application of polypropylene fiber in concrete can be used as an effective method for compensating the crack resistance of concrete.
5. Improve the quality of concrete products, effectively maintain the integrity of the edges, corners and surfaces of the products, so that the steel bars in the products are not corroded. Sand mortar fiber (pulp suggest using 3-12 mm special sand pulp fiber dispersion performance good toughness which can effectively prevent the ball than the performance of mortar fiber: adding fiber mortar mainly, endows mortar toughness, improve crack resistance of cement mortar, mortar early cracks were subdued, basically has the following functions:
(1) crack resistance to prevent the expansion of original defects in the mortar base and effectively delay the occurrence of cracks.
(2) anti-seepage: improve the compactness of mortar and prevent external water invasion.
(3) durable, improve the anti-freezing and fatigue resistance of mortar, and improve its durability.
(4) impact: improve the ability of the mortar matrix to withstand deformation, thus improving its toughness and impact resistance.
(5) tensile strength: the use of fiber can improve the tensile strength of the matrix.
(6) high toughness: mortar fiber has high toughness and strength, not easy bending in the mortar mixing into a ball, reticulate polypropylene fiber its appearance for fiber monofilament mutual coupling and reticular structure. When the polypropylene mesh fiber into the concrete, in the process of concrete mixing, fiber monofilament horizontal connections between the knead and friction effect and damage of concrete itself, forming fiber monofilament or mesh structure fully open, so as to realize the effects of numerous evenly mixed with polypropylene fiber concrete.
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