Concrete fiber engineering fiber anti-crack fiber

1. Product Content
Anti-crack fiber, also known as engineering fiber, concrete fiber, anti-crack fiber, is a kind of fiber with polypropylene as the main raw material and unique production. High-strength bundled monofilament fiber manufactured by process. Adding it to concrete or mortar can effectively control cracks caused by plastic shrinkage, dry shrinkage, temperature changes and other factors of concrete (mortar), prevent and inhibit the formation and development of cracks, and greatly improve the crack resistance, impermeability, impact resistance and earthquake resistance of concrete. ability.

2. Scope of use
Anti-crack fiber can be widely used in underground engineering waterproofing, concrete layers, walls, floors, industrial and civil construction projects. Pools, basements, etc., as well as various mortars and road and bridge projects.

3. Main functions
1. Crack-resisting effect on concrete:
Crack-resistant fibers are three-dimensionally distributed in concrete and can effectively It can reduce the stress concentration at the tip of micro cracks, weaken or eliminate the tensile stress caused by dry shrinkage of concrete or mortar, and prevent the occurrence and expansion of micro cracks. In plastic concrete, crack-resistant fibers play a role in supporting the aggregate. It can reduce and suppress the segregation tendency of concrete, thus reducing or even preventing the occurrence of surface cracks in concrete.
2. Improvement of the impermeability of concrete:
Anti-crack fibers can effectively reduce the plastic cracks of concrete and inhibit the development and interconnection of cracks. Evenly distributed fiber monofilaments form a supporting system. It hinders surface water leakage and aggregate settlement, reduces the bleeding of concrete, reduces the bleeding channels of concrete, and greatly reduces the porosity in concrete, thus significantly improving the impermeability of concrete.
3. Improvement in the freeze-thaw resistance of concrete:
Because the existence of crack-resistant fibers in concrete can effectively reduce the concentration of tensile stress in concrete caused by multiple freeze-thaw cycles, preventing Further expansion of micro. In addition, because of the improvement in the impermeability of concrete, it is also conducive to improving its freeze-thaw resistance.
4. Effect on the freeze-thaw resistance of concrete
5. Improvement of impact resistance and toughness of concrete
Crack-resistant fibers help absorb the kinetic energy of concrete components when they are impacted, and because The crack resistance effect of fibers can prevent the rapid expansion of internal cracks when concrete is subjected to impact loads, so it can effectively improve the impact resistance and toughness of concrete.
6. The influence of fiber on the impact strength of concrete.
7. The effect of fiber content on concrete toughness
(1) Improvement of concrete durability:
Crack-resistant fiber greatly reduces the occurrence and occurrence of cracks due to its good crack resistance effect. Development, the reduction of internal porosity slows down the corrosion and penetration of water corrosiveness and chemical media, chlorine salts, etc. in the external environment. In other words, the destructive and corrosive effects provided by cracks need to gradually penetrate and penetrate. The channels that emerge and expand become minimal due to the large reduction in cracks, and the damage to the corrosion of the main structural reinforcement is reduced, thereby greatly improving and progressing the durability of the concrete.
(2) Improvement of the fire resistance of concrete:
Adding crack-resistant fibers to concrete, especially high-strength concrete, can effectively improve the fire resistance of concrete and its safety in the event of fire. High-strength concrete has considerable compactness. In flames, the high-pressure steam formed by the heating of free water and decomposed chemical water inside the concrete is difficult to escape, which often leads to sudden bursting and collapse of concrete components, causing serious harm.

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