What Are the Different Types of Glued Steel Fiber?

What Are the Different Types of Glued Steel Fiber? 

Glued steel fiber is a type of concrete reinforcing fiber that is commonly used to enhance the performance and durability of concrete structures. Unlike traditional steel reinforcement such as rebar, glued steel fibers are added directly into the concrete mix, creating a three-dimensional matrix that provides increased strength, ductility, and crack resistance. There are several different types of glued steel fibers available in the market, each with its unique characteristics and applications. In this article, we will explore the different types of glued steel fibers and their uses.

1. Straight Steel Fibers

Straight steel fibers are the most commonly used type of glued steel fiber. They are typically made from low carbon steel and have a length-to-diameter ratio of 30:1 or more. These fibers are added to the concrete mix in a random orientation, providing multidirectional reinforcement. Straight steel fibers are very effective in controlling cracking and increasing the tensile and flexural strength of concrete.

One of the main advantages of straight steel fibers is their ability to distribute load evenly throughout the concrete, reducing the risk of localized failure. They are also highly resistant to corrosion and can be used in harsh environments. Due to their high strength and ductility, straight steel fibers are most commonly used in industrial floors, shotcrete, and precast products.

2. Hooked Steel Fibers

Hooked steel fibers are similar to straight steel fibers but have small hooks at the ends, providing a greater anchorage within the concrete matrix. The hooks prevent the fibers from pulling out of the concrete, making them particularly effective in improving toughness and fatigue resistance. Hooked steel fibers are also more suitable for mixes with larger aggregate sizes, as they prevent the fibers from balling up and clumping together.

These fibers are commonly used in overlay applications, slabs, and shotcrete for their ability to increase durability and reduce cracking. They are also effective in improving impact, abrasion, and freeze-thaw resistance.

3. Deformed Steel Fibers

Deformed steel fibers have a unique twisted or wavy shape, providing a large surface area for bonding with concrete. This shape also creates a mechanical interlock between the fiber and the surrounding concrete, increasing the pull-out resistance. The deformed shape of these fibers also helps to reduce crack width, leading to improved durability and flexural strength.

Deformed steel fibers are most commonly used in high traffic areas or structures subject to heavy loads, such as bridges, pavements, and airport runways. The interlocking mechanism of these fibers makes them ideal for projects that require high tensile strength and toughness.

4. Copper Coated Steel Fibers

Copper coated steel fibers are a type of specialty glued steel fiber that has a layer of copper coating on the surface. The copper coating improves the bond between the fiber and the concrete, resulting in better performance. These fibers also provide excellent electrical and thermal conductivity, making them suitable for applications that require such properties.

Copper coated steel fibers are commonly used in electrical and heating installations, as well as in structures where low electric resistance is important, such as in tunnels and mining facilities.

5. Stainless Steel Fibers

Stainless steel fibers are another specialty glued steel fiber that is commonly used in high-performance concrete. These fibers are highly resistant to corrosion, making them suitable for use in aggressive environments. They also have high tensile strength, which makes them ideal for applications that require high durability and crack resistance.

Stainless steel fibers are most commonly used in precast concrete products, parking garages, and exposed structures that require high durability and aesthetic appeal.

6. Glass Fiber Reinforced Steel Fibers

Glass fiber reinforced steel fibers, also known as synthetic fibers, are a combination of steel fibers and short glass fibers. The steel fibers provide the main reinforcement, while the glass fibers help to reduce plastic shrinkage and improve the ductility of the concrete. These fibers also improve the impact and fatigue resistance of concrete.

Glass fiber reinforced steel fibers are commonly used in thin-section concrete elements, such as roof decks and precast wall elements. They are also suitable for projects that require long-term durability, such as bridges and tunnels.

Glued steel fibers are an essential component in the production of high-performance concrete. They provide added strength, toughness, and crack resistance, making them ideal for use in a wide range of applications. The different types of glued steel fibers offer various benefits and are suitable for different projects, depending on the specific needs and requirements. Whether it’s for industrial floors, bridges, or precast products, there is a type of glued steel fiber that can enhance the performance and durability of any concrete structure.