CamaSteel offers rebar solutions for companies seeking rebar products, specifically hot-rolled rebar which is also known as deformed rebar. Rebar, or reinforcing bar, is a steel bar used to reinforce concrete and masonry structures to aid the concrete under tension. Without deformed rebar, concrete alone would lack structural rigidity under compression. Deformed rebar essentially is “deformed” with ribs, lugs, or indentations that are evenly spaced, although the pattern is not necessarily all the same, to promote a better bond with the concrete. This randomized surface indentation helps reduce slippage risk.
Our deformed rebar is necessary for concrete and masonry use, especially because concrete is only strong in compression, not tension. Rebar is used to solve this issue and compensate for the concrete’s imbalance of tension under load. This steel rebar reinforcement can be divided into primary and secondary reinforcement: • Primary reinforcement: necessary and employed to guarantee resistance in the structure to support the whole design • Secondary reinforcement: used for durability and aesthetics which provides enough localized cracking and stress resistance which typically occurs due to shrinking and temperature fluctuation Rebar that is sold by CamaSteel can also be used for other resistances besides the former two: • Confer resistance by spreading the concentrated loads into a wider area by providing more localized resistance and rigidity • Hold other rebar to assume their correct position • Be used as external steel tie bars that can reinforce masonry structures
In order to understand rebar that CamaSteel offers better, it is first necessary to know that steel’s thermal expansion coefficient is nearly equal to that of modern concrete meaning stresses in any direction to this rebar and concrete mixture would not be affected differently by temperature. Otherwise, these two materials would not be compatible. Common rebar is susceptible to rusting due to it being made of unfinished tempered steel. However, the concrete that covers the rebar is typically able to protect the rebar from corrosion reactions from carbonation or salt penetration. Common issues with rebar include having too little concrete which can compromise the guard from carbonation or salt penetration that concrete typically should protect from. Other issues include having too much concrete which can cause larger crack widths. As a result of these issues, rebar may succumb to cracking, spalling, and structural failure if not implemented properly. Other forms of rebar include fiber-reinforced plastic rebar used in high-corrosion environments.
Rebar grading is available for different specifications which notify purchasers of the yield strength, tensile strength, chemical composition and percentage of elongation. Grading alone for rebar, however, only indicates the minimum permissible yield strength of the rebar and must be referred to in conjunction with the material specification to full describe the product requirements. Some specifications for materials cover multiple grades making it necessary to indicate both grade and material specification. Rebar grades are always noted on engineering documents to avoid confusion over potential quality issues.
Rebar cages are typically fabricated using hydraulic benders and shears which help create the optimal shape. For more custom or small-scale work, a tool known as a Hickey or hand rebar bender is sufficient. This rebar is then placed using steel fixers or rodbusters, or concrete reinforcing iron workers. Paired with bar supports and concrete or plastic rebar spacers, this allows the rebar to be properly spaced and embedded into the concrete. Caged rebar is connected using spot welding, tying steel wire, and other mechanical connection methods. To prevent injury during the placement of rebar, steel rebar is often bent over or covered with special plastic plate caps.