There's no denying that different types of rebar, when properly selected, ensure the safety of a construction project. After all, if there are several options, it's because each has its own purpose and needs to be evaluated before making a choice.
Therefore, we've listed all the factors for you to consider and shown you the alternatives available on the market and their specifications. Keep reading!
Rebar is a type of steel bar with a grooved surface. It's an important element that provides stability to structures, especially in the construction of bridges, buildings, and viaducts.
It can be found in different thicknesses and lengths, and is produced from carbon steel or steel alloyed with other elements, such as copper and nickel, to provide more resistance and durability.
Below, we'll show you the various applications of rebar, particularly in civil construction. Check it out!
Rebar is widely used to reinforce reinforced concrete structures such as buildings, bridges, viaducts, dams, and more. In practice, it forms the steel mesh inserted into the concrete, giving the structure greater strength and load-bearing capacity.
In some situations, it is necessary to reinforce the existing structure of a building or bridge, for example, and rebar can be used for this purpose, ensuring safety and avoiding structural problems.
It can also be used in the manufacture of various metal parts, such as support bars, handrails, railings, fences, etc. Here, the rebar is cut and shaped according to the project's needs.
Rebar can also be used in the construction of prefabricated structures, such as precast slabs and columns. It serves as structural reinforcement to withstand the weights imposed later on the project.
The manufacture of furniture and decorative objects, such as tables, chairs, and lamps, also benefits from this material. It provides a modern, industrial look, bringing a distinctive aesthetic to the pieces.
Now that you know what they are and where they can be applied, how about learning about the types of rebar for construction? Each of them has specific characteristics for different applications in civil construction, so check out the two options next.
It has a grooved surface that provides greater adhesion to the concrete, ensuring greater structural strength. It is best suited for applications subjected to bending and compression stresses.
They are produced according to the Brazilian technical standards (NBR 7480), which establish the requirements for the manufacture and marketing of the product — including factors related to the chemical composition of the material, the dimensions and permitted tolerances, among other aspects.
This is the most common type of rebar used in construction. It is a low-carbon steel with a minimum tensile strength of 250 MPa (megapascals).
It's primarily used in small projects, such as houses, buildings up to three stories high, and walls. In other words, it's best suited for applications where mechanical strength isn't the primary consideration.
It is a medium-carbon steel with a minimum tensile strength of 500 MPa. It is used in large-scale projects, such as buildings and overpasses, among others.
In other words, it is especially suitable for works that will be subjected to high loads and tensile forces, as it has greater mechanical resistance and durability than CA-25 rebar.
A good choice is 14 mm rebar, found precisely in this type of steel. It is produced in bars of varying lengths, depending on construction needs.
It's high carbon, with a minimum tensile strength of 600 MPa. It's used in projects requiring high mechanical and structural strength, such as bridges, transmission towers, and others.
Among the possibilities, it can be used for large-scale projects, where greater tensile strength is required, such as in parts subject to torsional stress.
It does not have the grooved surface, which is a characteristic present in ribbed rebar. This means that adhesion to the concrete is smaller, so it is suitable for structures that withstand tensile stresses, such as beams, pillars and exposed parts, and that require a smoother and more uniform finish.
Its production involves heating steel ingots to high temperatures, followed by hot rolling in specialized equipment. Therefore, it is used where high mechanical strength is not required.
It is made by deforming a steel wire through a drawing process, which involves passing the steel wire through a diameter-reducing die to produce the final smooth rebar. It is used in precast concrete parts, such as porticos.
The first step in choosing the type of rebar is to consider where it will be appliedThis is because there are different sizes, shapes and grades, each suitable for specific uses, as you may have noticed previously.
Once this has been determined, other factors must be evaluated, such as:
Now you know that there are different types of rebar available on the market, each with its own characteristics and specific applications. Use our tips to choose the most suitable one and ensure the safety and durability of your structure.
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