JH anti-crack fiber

1. Product introduction

Anti-crack fiber, also known as engineering fiber, concrete fiber and anti-crack fiber, is a high-quality fiber made of polypropylene as the main raw material and manufactured with a unique production process. Strong bundled monofilament fiber. Adding it to concrete or mortar can effectively control cracks caused by plastic shrinkage, 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 waterproofing of underground projects, concrete roofs, walls, floors, pools, basements, etc. in industrial and civil construction projects, as well as various mortars. Zhonghe road and bridge project is underway.

3. Main properties
1. Crack-resisting effect on concrete:
Crack-resistant fibers are three-dimensionally distributed in concrete, which can effectively reduce the stress concentration at the tip of micro-cracks. It can 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, anti-crack fibers play a role in supporting aggregates, which can reduce and inhibit 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 plastic cracks in concrete and inhibit the development and interconnection of cracks. The evenly distributed fiber monofilaments form a supporting system, which hinders surface water elution and aggregate settlement, reduces the bleeding of concrete, reduces the bleeding channels of concrete, greatly reduces the porosity in concrete, and therefore improves the quality of concrete. The impermeability is significantly improved

3. Improvement of freeze-thaw resistance of concrete:
The presence of crack-resistant fibers in concrete can effectively reduce the risk of multiple freeze-thaw cycles. The tensile stress concentration within the concrete prevents further expansion of micro-cracks. In addition, due to the improvement of the impermeability of concrete, it is of course also conducive to improving its freeze-thaw resistance
4. Effect on the freeze-thaw resistance of concrete
5. Improvement of the impact resistance and toughness of concrete
Crack fiber helps to absorb the kinetic energy when the concrete component is impacted, and due to the fibrous cracking effect, when the concrete is impacting the load, the fiber can prevent the rapid expansion of the internal cracks, so it can effectively enhance the concrete to effectively improve the concrete impact resistance and toughness.

6. The effect of fiber on the impact strength of concrete

7. The effect of fiber on the toughness of concrete with the dosage
(1) Improvement of concrete durability

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Due to its good crack-blocking effect, the crack-resistant fiber greatly reduces the occurrence and development of cracks. The reduction of internal porosity slows down the erosion and penetration of water corrosiveness and chemical media, chlorine salts, etc. in the external environment. , that is to say, the channels that need to be provided by cracks to gradually penetrate and expand the destructive and corrosive effects will become minimal due to the large reduction in cracks, and the harm to the corrosion of the main bars of the structure will be reduced, thereby improving the durability of the concrete. It has been greatly improved and improved
(2) Improvement of the fire resistance of concrete
Adding anti-cracking fibers to concrete, especially high-strength concrete, can effectively improve the fire resistance of concrete and prevent fires. time security. 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.
4. Packaging and Storage
This product is made of woven bags lined with plastic bags, each bag weighs 20kg. This product should be stored dry and has a shelf life of two years. </p