Concrete is the most vital material in the construction of buildings. There is no need for any sort of familiarization for us. It is right around us, buildings, roads, bridges, etc, all these structures are made with concrete. It is impossible to imagine a structure without concrete. The use of concrete has a long way back since ancient times. The arrival of concrete drastically changed the course of architecture in the world.
TMT reinforced steels are currently the defacto standard for constructing commercial building projects and residential buildings. Known for its high tensile strength and ductility ratio, it is the ultimate option for reinforcement. Part I of this blog explained about TMT steel and its manufacturing process. To get the complete effect of the reinforced bar, there are certain things that must not be done. Some of these steps were explained in Part-I. Here we further a few more features.
TMT reinforced steel is the ultimate solution for reinforcement of a commercial structure. What the steels provide are the necessary tensile strength and ductility that is needed for the structure to withstand the forces of nature effectively and increased longevity to structure. The TMT steels are used because of its high tensile strength and ductility, which is resulted from the QST process that the reinforced bar undergo.
Reinforced steel is the most important component in the construction of buildings. Its multiple advantages in terms of strength and ductility are the sole reason for its increasing popularity and demand. Different versions of reinforced steel bars were introduced such as Mild Steel, HYSD etc. Each had their particular advantages that made it better than its predecessors. However, with the demand for more strength led to introducing stronger and better-reinforced steel bars. One such example is the TMT steel bars.
TMT steel reinforced bars have been used in constructions of building structures for a long time. They are primarily preferred due to the advantages offered in terms of tensile strength and ductility ratio. TMT Steel reinforced bars consists of different grades namely Fe 415, Fe 500, Fe 550 and Fe 600. Because of the availability of different grades and many dealers promoting different versions of the steel reinforced bars, purchasing the right TMT steel reinforced bar is an important task
Thermo Mechanically Treated (TMT) process has been developed for providing quality reinforcement to structures. The TMT process is a revolutionary process as it provides the steel bars high tensile strength as well as ductility. There are different grades for TMT reinforced steels namely Fe 415, Fe 500, Fe 550, Fe 600, where the numbers denote the minimum yield strength.
Nowadays TMT steels are commonly used in constructions. What is TMT? Why is it used than other types of steel? Well, before TMT was introduced Mild Steel (MS) bars, Cold Twisted Deformed (CTD) bars were primarily used with concrete for constructing buildings. Those steel were graded Fe 250 but their low strength was a problem for buildings requiring more strength.
The TMT in TMT Bars stand for Thermo-Mechanically Treated, it is a process of rapidly cooling down bars in the molten state. This cooling down process is either done spraying water at regular intervals. This regular interval will further define the characteristics of the bars. This interval of quenching of bars will give rise to different grades of TMT bars in fact. The goal here is to have a solid and hard outer surface with a pliable inner core. This outer shell is coated with a protective film, making them resistant to corrosion and rust, making them apt for constructing sensitive structures such as high rise residential buildings and bridges in humid areas. TMT bars and different Steel Grades.
Almost every modern structure made anywhere in the world nowadays contain TMT bars, they are right up there with concrete and bricks. Beyond a raw material, TMT bars can be used make beams. slabs, grids, columns and more. This makes TMT bars even more valuable. Even when TMT bars are bent to make secondary microstructures they do not lose their corrosion and anti-rust properties.
In this blog we will be taking a close look at Fe 415, the choice of the common man/ woman for building his/her dream home. We will taking a detailed look on how different grades of steel react to different standards tests undertaken by the Government of India. The number 415 in this grade of steel simply refers to its yield strength. Below some of the characteristics by different grades are marked.