POLYPROPYLENE FIBER MESH

Product Introduction

Polypropylene mesh fibers are made from polypropylene as raw material and can be processed and manufactured through special techniques. Its appearance is a network structure formed by the interweaving of multiple single fibers.

When polypropylene mesh fibers are added to concrete, during the concrete mixing process, the transverse connections between the fiber monofilaments can be disrupted by the concrete's own rubbing and friction, forming the fiber monofilaments or mesh structure to fully open up, thereby achieving the anti-cracking effect of a large number of polypropylene fiber monofilaments.

Polypropylene mesh fibers are highly effective in controlling microcracks caused by factors such as plastic shrinkage, dry shrinkage, and temperature changes in concrete, preventing and suppressing the formation and development of cracks. As a new type of anti-cracking fiber for concrete, polypropylene mesh fiber is becoming a feature of research and application in the field of fiber concrete after glass fiber and steel fiber.

SPECIFICATION:

Note: The length range is 15-50mm and can be produced according to customer requirements

Instructions for Use

1. Structural design

Although the addition of polypropylene mesh fibers can indeed significantly improve the performance of concrete, in general, polypropylene mesh fibers are still used as the "secondary reinforcing bars" of concrete to prevent shrinkage and cracking and extend the service life of concrete, rather than as the "main reinforcing bars" to bear the main load. A large number of experiments have also confirmed that although the number of fiber monofilaments obtained after the dispersion of polypropylene network fibers is considerable, due to the fact that the dosage of 0.9kg-1.8kg of polypropylene network fibers per cubic meter of concrete, when converted to volume rate, is only 0.1% - 0.2%, it has no obvious impact on parameters such as the compressive strength and elastic modulus of concrete. It is recommended that the reinforcement ratio of the main force-bearing ribs in the original design be not changed after the addition of polypropylene mesh fibers.

2. Length selection

In general engineering, the length of polypropylene mesh fibers is preferably 19mm

3. Proportioning design

Under normal circumstances

The dosage of polypropylene mesh fiber in single concrete is preferably 0.9kg, and the dosage of the protective layer of the bridge deck anti-solidification layer is 1.8kg. Moreover, there is no need to change the dosage of other materials. When there are special uses, the fiber dosage and concrete mix ratio can be determined through experiments. The application effect of fibers is better when dealing with concrete mixed with active materials such as silica fume, finely ground slag and zeolite powder.

4. Selection of the mixer

A forced mixer must be used

5. Feeding process

First, add crushed stones, then polypropylene mesh fibers, followed by sand and stir for two minutes to fully open the fibers. Finally, add cement and water and stir evenly. The construction can also be carried out in the conventional process sequence, but the stirring time should be appropriately extended to ensure the fibers are evenly dispersed

6. Stirring time

The purpose of stirring is to ensure that the fibers can be fully dispersed into single filaments or a network structure to be opened. Under normal circumstances, after adding polypropylene mesh fibers, forced stirring for 2 to 3 minutes is sufficient.

7. Forming process

There are no special requirements, but it should be ensured that the concrete is fully vibrated.

8. Maintenance process

Unless there are special requirements, the curing process of normal concrete can be carried out. The early curing of concrete should not be relaxed just because polypropylene mesh fibers are added.

9. Durability of polypropylene mesh fibers

Any organic material will gradually age and lose its excellent performance under the combined effect of factors such as heat, light and oxygen. However, this problem does not exist when using polypropylene mesh fibers, as the fibers are completely protected when placed in concrete.

Application scope

The performance improvement advantages that polypropylene mesh fibers endow to concrete are almost highly effective for any engineering fiber concrete. Considering the characteristics of our country, the most suitable engineering applications for polypropylene mesh fibers are prioritized as follows:

1. Concrete pavement, bridge deck, airport pavement, factory floor and other projects. It can extend the service life of the project (it can extend the service life of the road surface by 5 to 10 years).

2. Walls and roof slabs of tunnels and mines, etc. When the shotcrete process is adopted for concrete construction, the addition of polypropylene mesh fibers will effectively reduce the rebound rate of shotcrete, keeping the rebound and detachment of concrete within 5%, thereby enhancing construction efficiency, improving the working environment and facilitating promotion

Wet spray technology.

3. River courses, DAMS, water storage tanks and other projects. The improvement effect of polypropylene mesh fibers on the crack resistance, impact resistance and wear resistance of concrete will extend the service life of the project.

4. Military protective projects, wharf revetments, bridge piers, etc. The significant improvement effect of polypropylene mesh fibers on the impact resistance of concrete will enhance the safety of such projects and extend their service life.

Packaging

The inner packaging is 0.9kg/ bag or 1.0kg/ bag plastic film packaging. The outer packaging is 9kg per bag or 10kg per bag in plastic woven bags. (Customizable according to customer requirements)