What is threaded steel?

　　Although many people have seen or heard of steel reinforcement, its definition, understanding of how it is manufactured, knowledge of how it works, and its various applications are rarely known. This article introduces steel reinforcement.

　　What is steel reinforcement?

　　Steel bar is an abbreviation for "steel bar" or "steel bar", which is a metal rod used to help improve the tensile strength of concrete. Therefore, it helps concrete structures withstand tensile, bending, torsional, and shear loads. As these are weak areas of concrete, steel bars can reinforce concrete structures, otherwise these structures will collapse and disintegrate under these forces.

　　Steel bars are usually not visible in concrete structures because they are usually buried inside the concrete structure. It is almost always made of steel because it has thermal expansion properties similar to concrete, which can reduce temperature changes. Steel bars are usually not smooth and are made of ribs to prevent slipping within the concrete structure.

　　How is steel reinforcement made?

　　Steel bars are almost always made of steel and have excellent tensile properties compared to concrete. Interestingly, it is usually made of recycled steel, such as used cars, appliances, and machinery, which is melted in an electric arc furnace, cooled in the form of billets, and then stored. Once the steel billets are ready for manufacturing steel bars, they are reheated to a high temperature (but below their melting temperature) and quickly fed through a series of extrusion tools. The different stages of the extrusion mold continue to shrink the steel billet into smaller and smaller diameter bars until the required steel bar diameter is reached. A set of tools will generate the deformation required to prevent concrete from slipping. Then cut the steel bars into the required length.

　　How does steel reinforcement work?

　　The tensile strength of steel bars supplements the compressive strength of concrete to create a structure with a mixture of two strengths. This reduces the risk of fracture and enables the structure to better withstand the movements and forces that may lead to the failure of the concrete structure.

　　Steel bars are usually laid in a grid pattern. This means that different parts of the steel bars are placed parallel and perpendicular to each other, so that they can withstand tensile forces from multiple directions. The external deformation of the steel bars ensures that they do not slide out of the concrete structure. Sometimes the steel bars are bent at the end to further fix them in the concrete structure.

　　Where are steel bars used?

　　Steel bars are used in most concrete structures. Common examples include:

　　High rise building

　　Parking ramp

　　Concrete bridge piers

　　bridge

　　Basics

　　Thick roads and lanes