What is the difference between simple and ribbed rebar?
A simple rebar is a long steel cross-section whose cross-section is round and there are no protrusions or treads on its surface. These rebars, as their name suggests, have a smooth and polished surface and no details such as protrusions and treads. does not exist These types of rebars are used to increase the tensile strength of concrete and are used in construction in a limited way. It says that according to the old Russian standard, it is known with the abbreviation A1, and now most of the time this rebar is known by this name. In the national standard of Iran, simple rebar is introduced with the symbol S240. In terms of material, simple rebar can be found in iron, steel, aluminum, steel, etc., the most common of which is simple steel rebar. This rebar is produced and marketed in different diameters between 6 and 200 mm and in lengths of 6 and 12 meters, each of which has its own function. Compared to other rebars, simple rebars have less tensile strength and for this reason they are included in the soft steel category. Seismic is used. They can also be used in some industries because of their capabilities. All types of alloy bars are also simple in shape.
Rib rebar is a long steel section that has protrusions called treads on its outer surface. There are different types of treads on the surface of the ribbed rebar and they are spiral, cross-shaped, and the combination of the two, which is called a compound tread. One of the most important differences between simple and ribbed rebar, which is very important in building construction, is the existence of treads. The brick increases the adhesion of the rebar to the concrete. The main task of these rebars is to increase the strength and resistance of concrete. Ribbed rebars are produced in two forms, branches and coiled rebars, and in sizes between 5.5 and 40 mm. According to the Russian standard, ribbed rebars have types and grades that are divided into A2, A3, and A4 bars. . The difference between these rebars is that the A2 rebar has fewer treads, but as the number increases up to A4, their amount increases. Another difference between these ribbed rebar grades is the percentage of carbon, their hardness and flexibility. Ribbed rebars are mainly used in construction and products such as Khamut, pin bar, stirrup and zigzag are produced from them, and these products are used in different stages of concrete reinforcement. Also, rebar is the main member in the roof, columns and reinforcement.