If you know the characteristics of concrete, you’d be genuinely amazed. Its strength is incredible, so much so that you have to exert a tremendous amount of force just to crush it. Ironically, concrete has a weak tensile strength. While it’s almost impossible to destroy it, it’s relatively easy to crack it. As such, to increase the tensile strength of a concrete wall, reinforcement or rebar will be needed.
Rebar lengths and diameters come in a wide variety, but as for the types of rebar, there are only six that are generally used. Here are those six types and more about their pros and cons:
The most significant advantage of this rebar is its cost-efficiency. It is made of manganese and is one of the least resistant to bending. It is pretty easy to work with, but structural steel and fabrication specialists do not recommend this rebar to be used in areas where earthquakes are frequent. The project requires unyielding structural integrity from the reinforcement.
Carbon steel rebar, or more commonly known as “black” bar, is used for almost every type of project with very few exceptions. The only weakness of this type of rebar is that it is prone to corrosion, and when it does, it could expand and lead to the cracking of the concrete it supports. So, if the project is in an area where there will be rebar exposure to water saturation or humidity, it’s best to go for other options instead. Note that if you need the best value to tensile strength ratio, you’d be hard-pressed to find better rebar than this one!
Epoxy-Coated Black Rebar
This is black rebar coated with epoxy, so it has all the best characteristics of black rebar but up to 1,700 times more corrosion-resistance. The coating can be delicate, and when the layer is damaged, its corrosion resistance is also reduced.
Although it is only forty times more corrosion-resistant than black rebar, galvanised rebar may be better in this respect than epoxy-coated black rebar because its coating is more difficult to damage. However, it’s also around 40% more costly because of that characteristic than its epoxy-coated counterpart.
Glass-fibre-reinforced polymer is similar to carbon fibre. Also, there are no field bends when using GFRP. The best thing about this is that there are zero risks of corrosion. This is why it is considered by many to be one of the best concrete reinforcement bars. It may cost up to ten times as much as epoxy-coated black rebar per pound. However, because it is significantly lighter, you are only likely to pay twice as much as the epoxy-coated variant!
Stainless Steel Rebar
The most expensive one among these types of rebar at eight times the cost of epoxy-coated black rebar is the preferred material of many pros for almost any project. That said, it may be excessive to use it in all circumstances. But for projects that can justify their use, they’re getting about 1,500 times more corrosion resistance compared to a black bar. They are also more damage-resistant than any other type of rebar and can be bent in the field.
The rebar necessary for a project can be determined by a structural steel and fabrication specialist and the project engineer. Nevertheless, you must consider the cost, the corrosion resistance, the environment, and the strength required for the project.
As the trusted structural steel and fabrication specialist on the Sunshine Coast, Phoenix Reinforcing provides quality reinforcements to clients ranging from DIYers to major construction companies. We offer custom cage fabrication and in-house delivery service – get in touch with us today!