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Steel Fiber And Rebar

Dec. 16, 2021

Steel fiber and rebar have some things in common. Both are made of steel. Both are used to reinforce concrete, and both can be found in floor slabs. Steel fibers and rebar work differently and accomplish different goals. Steel fibers prevent cracks, while rebar limits the width of cracks.

Unlike rebar or mesh reinforced concrete, which is located on a particular slab, steel fiber reinforced concrete is evenly distributed throughout the concrete mix. The primary function of the steel fibers is to prevent cracking on a micro level.


Steel fiber


The role of steel fiber:

By intercepting cracks the moment they begin, steel fibers inhibit the growth of cracks. This makes reinforced concrete ideal for projects that are prone to cracking like sidewalks, industrial flooring, commercial parking lots, and interstates.As a rule of thumb, small fibres tend to be used where control of crack propagation is the most important design consideration. High fibre count (number of fibres per kg) permits finer distribution of steel fibre reinforcement throughout the matrix. And consequently, greater crack control during drying process. On the other hand, because they exhibit better matrix anchorage at high deformations and large crack widths, longer, heavily deformed fibres afford better post-crack "strength". However, unlike shorter fibres, the dramatically reduced fibre count of longer product yields correspondingly less control of initial crack propagation.


The role of rebar:

Since steel fibers do such a good job preventing cracks, why would we ever reinforce concrete with anything else? Well, it turns out that fibers can't prevent every crack in every situation. With enough tensile stress driving it, a crack can rip past the fibers and grow wide. Rebar, also known as reinforcement steel and reinforcing steel, is a steel bar or mesh of steel wires used in reinforced concrete and masonry structures to strengthen and hold the concrete in tension. To improve the quality of the bond with the concrete, the surface of rebar is often patterned.By casting rebar into concrete, it is able to carry tensile loads and so increase overall strength. Often you can design concrete structures so the tensile stresses stay low, and then steel fibers do fine as the sole reinforcement. That's the idea behind wide-slab floors, which are made thick enough to resist applied loads without cracking. But sometimes you have to design for high tensile stresses, and that's when rebar comes into its own.

The value of rebar lies in its ability to resist tensile stress after concrete has cracked, and also in its length, which allows for continuity over long distances.


The role of steel fiber and rebar:

In truth, steel fibers and rebar can never be equivalent because they work differently and achieve different goals. It often makes good sense to use both.If you want to stop microcracks from growing into visible cracks, you need steel fibers. If you want to limit the width of cracks that will occur anyway, you need rebar. And if you want to achieve both goals, maybe you need both products.


For more information and help. Jinzhou Guang Ya metal products Co. As a steel fiber supplier, is your best choose. Contact us today to learn more about options, and start experiencing their unique benefits.


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