When polypropylene staple fibers are blended into concrete, the static modulus of elasticity is lower than that of ordinary concrete.

When the polypropylene staple fiber blending ratio is in the range of 0.05%~0.10%, the change of fiber content has little effect on the static elastic modulus, but the fatigue deformation modulus increases with the increase of the blending rate. This indicates that polypropylene staple fibers can exert greater effects on the structure under dynamic loading. polypropylene staple fibers with low modulus of elasticity and high fatigue strength are better at improving the fatigue resistance of concrete.

The addition of polypropylene staple fibers in concrete can alleviate the internal stress of concrete caused by temperature changes and prevent the expansion of temperature cracks. According to the concrete antifreeze test method, repeated freeze-thaw cycles, no delamination and cracking . Practice and research have shown that the addition of polypropylene staple fibers in concrete can be used as an effective concrete temperature compensation for crack resistance, thus improving the frost resistance of concrete.

polypropylene staple fiberis added into the mortar concrete to effectively control the micro-cracks caused by factors such as solid-plastic shrinkage, dry shrinkage, temperature change and other factors of concrete (mortar), prevent and inhibit the formation and development of cracks, and greatly improve the crack resistance and impermeability of concrete. Impact resistance and shock resistance.

Made of high-molecular materials such as PP—fixed-size short fibers are incorporated into cement concrete to improve the crack resistance and reinforcement of building materials. The addition of modified PP fiber can improve the crack resistance of the material on the cement concrete, prevent or prevent the formation and development of cracks in the cement solidification process, thereby reducing the corrosion of the steel material in the cement concrete and prolonging the service life of the cement concrete building.

Hai'an County Qinfeng Chemical Fiber Co., Ltd. has advanced production equipment, perfect after-sales service, efficient logistics and strong technical strength. Its polypropylene staple fiber specifications range: fiber fineness: 1.5-200D, fiber length: 5- 150mm, can be customized to meet your individual needs.

"Qinfeng" brand polypropylene staple fiber has superior moisture permeability and quick drying property, good combability and spinning performance, and can produce soft and tough fabrics. The fabric is light in weight, warm in warmth, delicate in hand and comfortable to take. , acid and alkali resistant. At the same time, it has the ability to dissolve quickly, good filling and sound insulation.

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