Polypropylene fiber with anti-static and anti-aging and other special technology, from the polypropylene pellets by adding masterbatch, blending, spinning, winding, drawing, cutting made of chopped fiber, can effectively improve the fiber and base material The use of mortar / concrete, can prevent, reduce and delay the early plastic cracking, greatly improve the overall performance of mortar / concrete.

Polypropylene fiber in the course of the inevitable use of some of the common problems, the slightest edge to help you organize the following, and related to the answer, welcome to see!

1
Can polypropylene fiber be used as a waterproof material?
There are three types of concrete waterproof structure:
Expansion compensation
2. Watertight density;
3. Anti-cracking waterproof type.
And this polypropylene fiber is through the physical reinforcement to reduce the cracking of concrete, to avoid the formation of pores through the concrete and greatly improve the waterproof capacity of concrete, concrete structure is the ideal self-waterproof material.
2
What is the role of polypropylene fibers in concrete?
1. Reduce the shrinkage of concrete cracks, improve the impermeability and durability of concrete.
2. Ensure the homogeneity of concrete.
3. Reduce the brittleness of concrete.
4. Improve the fire resistance of concrete.
3
Do you want to mix fiber concrete with a special mixer? Can I add fiber to commercial concrete?
No special equipment required. Concrete concrete can be prepared by using a forced concrete mixer commonly used on construction sites. In order to ensure that the fiber in the concrete mixing evenly, you can extend the appropriate time. One approach is to mix the concrete into the conventional mix, and then in the case of non-stop, will have been weighing good fiber added to the concrete, stirring can continue for 3mins, so that the fiber into a root monofilament evenly distributed in the concrete Mix in the material. In the actual project more use of the method is to direct the fiber and gravel material into the mixer with stirring, the effect is better.

Concrete mixed with concrete can be prepared in the concrete mixing plant. Can be from the mixing device feeding platform on the feeding port at the manual way directly into the weighing of good fibers. Although the density of the fiber is only 0.91g / m3, but the actual operation shows that in the feeding will not produce flying phenomenon. The slump of the fiber added to the concrete is slightly reduced, but does not affect the workability of the concrete, nor does it affect the change in the slump of the concrete (the change in the slump of the concrete depends mainly on the water reducing agent used) The
4
What is the appropriate amount of polypropylene fiber in concrete?
Polypropylene fiber can play its role in concrete, largely depends on the number of fiber monofilament in the concrete and its uniform distribution. Since the surface of the fiber is covered with a special film, tens of millions of monofilament fibers can be distributed evenly in the concrete. To this end, in general, the fiber in the concrete content is not too high, 1m3 can be mixed with 0.6-1.2kg. Set the fiber content of 1m3 concrete added 0.9K, then 1m3 concrete monofilament fiber (length of 12mm) can reach nearly 200 million.

5
What is the effect of polypropylene fiber and bulking agent?
In the concrete mixed with expansion agent and mixed fiber can achieve the purpose of anti-cracking anti-seepage. But the role of the principle and efficacy of a certain difference.

Principle: expansion agent through the chemical reaction to produce ettringite or calcium hydroxide crystals, so that concrete expansion to compensate for its contraction, thereby reducing or preventing the occurrence of concrete cracks. The fiber acts through the physical action to reduce the occurrence of concrete cracks.

Efficacy: expansion agent only in the humid environment in order to get better anti-cracking anti-seepage effect. If in a dry environment may not be effective or even counterproductive; and fiber, whether in wet or dry environment can get a good anti-cracking anti-seepage effect.
Construction conditions: expansion agent on the curing conditions are very harsh, requiring water conservation for more than 14 days, fiber maintenance is no special requirements.
6
Polypropylene fiber in the mixing process will not be a group?
will not. After special treatment of fiber in the mixing process, the mechanical stirring, aggregate impact, in the alkaline cement slurry environment can be automatically dispersed, evenly distributed in three ways, not knot.
7
Does the use of polypropylene fibers need to change the mix of concrete or mortar?
No need. Polypropylene fiber is a complete physical reinforcement effect, the concrete ratio does not need to be adjusted.
8
Can polypropylene fibers reduce concrete cracking?
The fiber can effectively reduce the plastic cracking and early shrinkage cracking of concrete. The experimental results show that the fiber can reduce the cracking by more than 90%.
9
What are the precautions for using polypropylene fibers?
1. The role of fiber is a "secondary reinforcement", can not replace the structural reinforcement material, nor can reduce the size of the main structure.
2. Can not be used alone to solve the settlement, mass concrete hydration heat and strong external impact of the occasion.
3. Can not because of the use of fiber and reduce the construction quality management requirements, should still be the relevant technical specifications for construction and conservation.