While TMT stands for ‘Thermo Mechanical Treatment’, the name is basically their process of protection and HYSD means ‘High Yielding Strength Deformed’ which is their main characteristic when compared with other rods. HYSD bars can be further divided into Torsed / twisted steel (TOR Steel Bars) and Cold Twisted Deformed Steel Bars (CTD Steel Bars).
In this blog, we will see how a homeowner can do the simplest of things to make sure that the foundation of his/her home stays strong for technically, forever. The previous blog was about the how the strength of a TMT bar reduces drastically with corrosion.
Steel has been used for many decades by many civilizations for building structural and engineering purposes, they have continued prove very effective in both land and marine environments due their unique combination of mechanical properties which gives them natural protection against natural variables. Where steel stumbles as the ultimate building block is with its corrosion by various environmental actions. When it comes to modern construction, generally, the concrete mix is reinforced by steel bars in the case of the common RCC structures.
It is expected that in construction there will become unexpected surprises and in one of those many unexpected surprises not many of the same long-term effects as the need to bend TMT bars. Bending TMT bar is a tricky skill, there are some obvious downsides such as broken TMT bars. The long-term negative effects come from the breaking of the protective film from the surface of the TMT bars. These films are coats of special paints which does rust or corrosion to happen. This happens as TMT bars have a strong shell and a soft inner core, while outer shell can withstand rust and corrosion for a long long time as they come prepared with a protective coating.
One might wonder how TMT bars can be a good news for the environment, the fact of the matter is the most TMT bars are made of steel. Steel is the most recycled material on the planet, one of the reasons for it is the fact that recycled steel does not experience any loss in quality or strength. Steel is so popular for recycling, that in the year 2017 more steel was recycled that all the other recyclables combined. When talking pure numbers, just by recycling 1 kg of steel, it can cause reduction of 2 kgs of greenhouse gases to the atmosphere. Recycling steel also reduces the spread of landfill, as the materials can get reprocessed, thereby saving raw materials.
An average homeowner or even more accurately an average person will be shocked to learn that India spends more money on fighting rust than on education. According to Sunil Duggal of Hindustan Zinc Ltd (HZL), “India loses around 4-5 percent of GDP annually on account of corrosion losses.” India currently spends around 3.8% of its GDP on education. Even if a nation can live this situation, an average homeowner doesn’t need to live like this.
In the previous blog we broadly discussed the subtle differences between FE415 and FE500, in this blog we will discuss some details about the real world implications when using FE415 and FE500 TMT bars. Let’s first discuss the needs and demands of an average homeowner strength, aesthetics, reliability, longevity and again strength.
Concrete is the heart and soul of any construction project, they can moulded into almost shape and can withstand anything weather and climate around the world. But, what the concrete lacks is the strength, ductility and a low tensile strength. This is where TMT bars come to save the day, a mix of concrete and TMT bars can help engineers to build structures like never before in the history of mankind.
As the number of earthquakes hitting India increases, the quality of structures to withstand has also exponentially increased. The issue of surviving these jolts have become a matter of quality in the construction sector. The fact that India’s geology is as diverse as the population, different part of the country is affected by earthquakes in different degrees. TMT bars have greatly reduced the negative effects of earthquakes on the common man.
TMT bars have changed how homeowners, engineers and contractors see the construction industry. Be it a homeowner or an engineer, choosing a TMT bar depends upon multiple metrics. It could be the weight it needs to support, type of soil where the structure is built and the type of structure itself.