What is Steel Rebar and what are the benefits for my project?

What is Steel Rebar and what are the benefits for my project?

When you are getting prepared to begin a concrete or cement construction project, or when you are analyzing the plan and buying materials You may have heard the word Steel Rebar many times. But what Exactly is Rebar and what does it do for your project? Why is it so important for the project and do you need all the types for each project? In this article, we are going to answer all your questions about Rebar.

What is Rebar?

A metal bar that supports the tensile strength of concrete is called Rebar, and is stand for “reinforcing bar” or “reinforcement bar.” It enhances some features such as shear stresses of concrete constructions and also endurance tensile, bending, torsion. As these are regions of vulnerability for concrete, Rebar reinforced concrete buildings, which save from falling apart.

In concrete constructions, it is not normally apparent because it is typically concealed in the structure of the concrete. Most often the TMT bar made of steel because steel has the features of thermal expansion like concrete that reduces problems with the temperature change. TMT bar is not smooth oftentimes however it is formed like ribs to avoid sliding inside the structure of the concrete.

Steel Rebar

Steel Rebar

How is Rebar made?

Usually, Rebar is manufactured of steel with the highest tensile characteristics in opposition to concrete. Normally it is produced from recycled steel from broken-down vehicles, appliances, and machinery. TMT bar are melted by electric arc burners and after that cooled into billets. Next, the billets are available to be used in the making of Rebar; they are burned to the highest temperatures and then fed quickly through a series of extrusion instruments. They are maintained below the melting temperature. Until the suitable TMT bar diameter is accomplished, the different extrusion steps are resumed to clamp the steel billet into smaller rods.


8 Main Types of Rebar

  • Carbon Steel Rebar: This one is the most common type. Sometimes it is referred to as a “black bar.” It’s amazingly versatile, as it corrodes more easily than other models, it is less used in high humidity areas or for some structures that are frequently exposed to water.
  • Welded Wire Fabric: Welded wire fabric (the short form is WWF) is made of a series of steel wires that are afforded at right angles and electrically joined at all steel wire intersections.

It is beneficial in slab-on-ground slabs where the spot has been completely compacted. A more substantial fabrication of welded wire fabric can be applied in walls and structural floor slabs. This one is generally applied in road pavement, box culverts, drainage structures, and miniature concrete canals.

  • Epoxy-Coated Rebar: Epoxy-coated Rebar is just Rebar coated with a light epoxy coat. This delivers them up to 1,700 more times resistant to corrosion than standard carbon Steel Rebar. That’s why they are frequently utilized in areas in contact with saltwater or where a corrosion problem is expected.

The single problem is that the coating can be very sensitive, so bars must be bought from a reliable supplier.

A special concern about epoxy-coated Rebar is that they can undergo severe corrosion anywhere the epoxy is destroyed as all the corrosion is concentrated at that one point.

  • Galvanized Rebar: In terms of corrosion resistance Galvanized Rebar is 40 times better than carbon Steel Rebar. They are extremely harder to ruin than epoxy-coated rebar.

As a result, this one is an excellent alternative to epoxy-coated Rebar if you want something less possible to corrode.

But, galvanized Rebar is about 40% more pricey than epoxy-coated rebar.



Steel Rebar

Steel Rebar


  • Sheet-Metal Reinforcing Bars: For regular practice in floor slabs, stairs, and roof construction sheet-metal reinforcement is used. It is composed of annealed sheet steel components that are bent into corrugations of about one-sixteenth of an inch deep including holes punched at adjusted spacing.
  • European Rebar: The European Rebar is the low-cost one. European Rebar is produced originally of manganese, so it makes European Rebar cheaper and easier to bend.

This flexibility advances European Rebar to work within the field more easily, though it is commonly not suggested for usage in areas that undergo earthquakes nor for projects that need firm structural integrity from its rebar.

  • Stainless Steel Rebar: Stainless Steel Rebar is pretty pricey – about eight times more expensive than epoxy-coated rebar.

Moreover, it is the best Rebar worthwhile for most projects. Still, applying stainless steel in whole for the most unique of places is usually overkill.

Still, for those who have a great purpose to perform it, stainless Steel Rebar is 1,500 times more resistant compared to corrosion than black bars. Additionally, Stainless Steel Rebar can be bent in the field, which is very handy.

  • Glass-Fiber-Reinforced-Polymer (GFRP) Rebar: Similar to carbon fiber, GFRP Rebar under any conditions will not corrode ever. But they are very expensive, about ten times more than the cost of epoxy-coated rebar.
 Why do we need various Rebar sizes?

In concrete it affords uniform structural integrity, however concrete material is extremely strong in compression. It is nearly completely devoid of tensile strength. Without reinforcement, this inherent delicacy of concrete becomes apparent in the material’s function as a result it will bend and easily fracture.

Accordingly, picking the suitable Rebar size and weight is important to safe building methods.

What Rebar sizes do you need to practice?

If you have small-scale and domestic projects, Rebar with diameters of 6mm, 8mm, and 10mm will normally serve you the best.

For example, the standard practice for driveways and patios is the smallest one which is a 6mm Rebar. Be careful, this is for small designs which require minimal load-bearing and is suitable for building very low levels of tensile stress.

On the other hand, the construction of walls, piers, or columns needs an 8mm or greater rebar. Likewise, for building footings, foundations, a great option would be a 10 mm rebar. A 10 mm diameter or more numerous Rebar is most suitable for footers and foundations to reduce settling.

Large-scale, civil engineering projects such as a tunnel or big bridge construction, require higher diameter rebar, especially where long spans are expected.

Steel Rebar

Steel Rebar


Pros of Steel Reinforcement Bars:

  • Modulus of Elasticity: As Steel has a high modulus of Elasticity i.e. 200GPa (200 x 10⁹ N/m²), it can benefit the steel to stretch in tension (up to 200GPa) with no sign of breaking. Its shape on removal of load will be regained.
  • Ductility of Steel: Steel has high Ductility. i.e. Steel Rebar will run ductile under more powerful loads.

What is Ductility? It is one of the abilities of material that provides plastic deformations (i.e. permanent shift in its dimensions) under usage of load before breaking.

  • Coefficient of Thermal Expansion: The coefficient thermal expansion is almost the same for Steel and concrete (shift in dimension based on temperatures). So both of them will experience the equivalent length differences in high temperatures.
  • Resistance: through harsh conditions, while transporting, storing, bundling, and placing on construction site Steel is resistant. (In case of minor damage, it does not affect its performance significantly.)
  • Strength: For high impact load It is sufficient to withstand.
  • Readily Available: There are enough Steel Rebar in the structural Steel industry. So you will have as much Rebar as you need
  • Ready Build: Ready build steel is also available at any time. They reduce the time that is spent on cutting and bending and save lots of construction time. In addition, it decreases the wastage of steel in bending and cutting.
  • Steel is able to be recycled easily.


Cons of Steel Rebar:

  • High Cost: Steel is costly and can make an extreme difference in the financial plan.
  • High Temperatures: For melting Steel, you need extremely high temperatures. That is why steel is tied and not welded.
  • Reaction: Too little concrete cover enables the water to enter and react with Steel Rebar. This causes concrete to crack. Infrequently concrete totals reacting with steel will cause concrete to spall.
  • Rust: Steel is exposed to weather rusts and decreases the durability of reinforced concrete. When rusts begin building up nearby the Steel Rebar, it makes severe internal tension on the neighboring concrete, beginning to cracks in concrete.
  • Weight: This metal has a heavy weight




Leave a Reply

Your email address will not be published.