Comparative advantages of steel fiber and other fiber materials

In the field of building materials and industry, there are many types of fiber materials, such as glass fiber, carbon fiber, polypropylene fiber, etc. Compared with these fiber materials, steel fiber has the following significant advantages:

Mechanical properties
High strength and high toughness
Steel fiber has high tensile strength. Adding steel fiber to concrete can significantly improve the tensile, bending, impact and fatigue resistance of concrete. For example, at the same dosage, steel fiber concrete has a 40% - 80% increase in tensile strength, a 60% - 120% increase in bending strength, and a 50% - 100% increase in shear strength compared to ordinary concrete; and at the usual fiber dosage, the impact compressive toughness can be increased by 2 - 7 times, and the impact bending, tensile and other toughness can be increased by several times to dozens of times. Although glass fiber is also high in strength, it is relatively brittle and easily breaks when subjected to external force. Although polypropylene fiber has a certain reinforcing effect, the degree of improvement in mechanical properties is far less than that of steel fiber.

Stable reinforcement effect
Steel fibers have good adhesion to the concrete matrix, which can effectively transfer stress and achieve joint force, which can greatly improve the durability and bearing capacity of concrete. In contrast, some synthetic fibers (such as polypropylene fibers) have weak adhesion to concrete and are easily separated from the matrix during force, resulting in limited reinforcement effect. Although carbon fiber has good adhesion to concrete, it is expensive, which limits its large-scale application to enhance mechanical properties.

Durability
Corrosion resistance is relatively good
Generally, properly treated steel fibers can have certain corrosion resistance in common engineering environments. In particular, copper-plated steel fibers, the copper coating on their surface can greatly improve corrosion resistance and durability, and can increase the conductivity of concrete. They are widely used in floor paint, industrial wear-resistant floor, anti-static floor and other fields. However, many natural fibers, such as plant fibers, are easily affected by microbial erosion and environmental humidity, and have a short service life.

Good high temperature resistance
Steel fibers can withstand high temperatures and still maintain good mechanical properties in high temperature environments. For example, in some high-temperature industrial infrastructure, steel fiber can enhance the ability of materials to resist high-temperature deformation and damage. In contrast, organic fiber materials such as polypropylene fiber are easy to melt or soften at high temperatures and lose their reinforcing effect.

Cost-effectiveness
High cost-effectiveness
The raw materials of steel fiber are widely available, the production process is relatively mature, and the manufacturing cost is relatively low. Compared with high-performance but expensive fiber materials such as carbon fiber, steel fiber can achieve better reinforcement effects at a lower cost while meeting most engineering needs, and has higher cost-effectiveness and engineering practicality.

Application adaptability
Wide range of applications
Steel fiber can not only be used in various structures in the construction field such as beams, columns, plates, roads, pipelines, protective projects, etc., but also in industrial fields such as refractory materials. Some other fiber materials may limit their application range due to their own performance characteristics. For example, glass fiber is easily corroded in an alkaline environment, and the use scenarios are subject to certain constraints.