product description:
product description:
Polypropylene mesh fiber is made of polypropylene through special processing. Its appearance is a network structure formed by the interconnection of multiple fiber monofilaments.
When the polypropylene mesh fiber is put into the concrete, during the mixing process of the concrete, the transverse connection between the fiber monofilaments can be destroyed by the rubbing and friction of the concrete itself to form the fiber monofilaments or the network structure is fully opened, so that a large number of polypropylene fiber monofilaments have the effect of preventing cracking.
Polypropylene mesh fiber is extremely effective in controlling micro-cracks caused by factors such as impact plastic shrinkage, dry shrinkage, and temperature changes, and prevents and inhibits the formation and development of cracks. As a new anti-cracking fiber for concrete, polypropylene mesh fiber is becoming a hot research and application hot spot in the fiber field after glass fiber and steel fiber.
Instructions for use:
Structural design:
Although the incorporation of polypropylene fiber can indeed significantly improve the performance of concrete, in general, polypropylene mesh fiber is still used as the “secondary reinforcement” of concrete to prevent concrete shrinkage and cracking to prolong the service life, rather than the “main reinforcement” 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 mesh fibers is large, the volume ratio of 0.9kg-1.8kg of polypropylene mesh fibers per cubic meter is only 0.1%-0.2%, so it has no obvious impact on the parameters such as compressive strength and elastic modulus of concrete. It is suggested that the reinforcement ratio of the main stress bars in the original design should not be changed after the polypropylene mesh fiber is added.
Length options:
In general engineering, the length of polypropylene mesh fiber is preferably 19mm
Matching design:
Normally, the appropriate dosage of polypropylene mesh fiber in the unilateral concrete is 0.9kg, and the dosage of the protective layer of the waterproof layer of the bridge deck is 1.8kg. It is not necessary to change the dosage of other materials. When there is a special purpose, the dosage and proportion of polypropylene mesh fibers can be determined through experiments. For concrete mixed with silica fume, finely ground slag, zeolite powder and other active mixed materials, the effect of using polypropylene mesh fiber is better.
Blender options:
A forced mixer is required.
Feeding process:
Put in crushed stone first, then put in fiber, then put in sand and stir for two minutes to fully open the fiber, then put in cement and water and stir evenly. The construction can also be carried out according to the input sequence of the conventional process, but the stirring time should be extended appropriately to make the fibers disperse evenly.
Stiring time:
The purpose of stirring is that the fiber network can be fully dispersed into monofilament or network structure is opened. Under normal circumstances, after adding alkali and polypropylene mesh fiber, forced stirring for 2-3 minutes is enough.
Forming process:
There are no special requirements, but the concrete should be fully vibrated.
Maintenance process:
If there is no special requirement, it can be carried out according to the normal concrete curing process. Early care of alkali cannot be relaxed by incorporation of polypropylene mesh fibers.
Durability of polypropylene mesh fibers:
Any organic material will gradually age under the combined effects of heat, light, oxygen and other factors and lose its excellent performance. However, there is no such problem when using polypropylene mesh fibers, because the fibers are completely protected in concrete.
Applications:
The improved performance advantages imparted by polypropylene reticulated fibers to concrete are very effective for almost any engineered fiber concrete. The engineering purpose is as follows:
Concrete pavement, bridge deck, airport pavement, factory floor and other projects. The service life of the project can be extended (the good life of the road surface can be extended by 5-10 years).
Tunnel, mine wall, roof, etc. When the spraying process is used for concrete construction, the incorporation of polypropylene mesh fibers will also effectively reduce the rebound rate of the sprayed concrete, so that the rebound of the concrete will not exceed 5%, improve the construction efficiency and improve the working environment, and facilitate the promotion of wet spraying technology.
River courses, dams, storage tanks and other projects. The improvement effect of polypropylene mesh fiber on the crack resistance, impact resistance and wear resistance of concrete will prolong the service life of the project.
Military protection engineering, wharf revetment, bridge piers, etc. The significant improvement effect of polypropylene mesh fiber on the impact resistance of concrete will enhance the safety and prolong the service life of such projects.
Package:
The inner packaging is 0.9kg/bag or 1.0kg/bag plastic film packaging; the outer packaging is 9kg/bag or 10kg/bag plastic woven bag
Post time: Jul-24-2023