It may seem like buying non-certified TMT rebar is a good way to save money. But in reality, it is due to faults in the structure of these non-certified TMT bars that many constructions see cracks and damage. There is a reason why ISO certified TMT rebar is preferred by industry experts. Non-certified ones cannot stand various pressures, temperature changes and contact with moisture. TMT rebars are crucial in providing strength and durability to reinforced concrete structures, making them ideal materials for critical constructions.
Moreover, ISO certified TMT rebar is capable of lasting longer due to its robust build. This in turn saves you money from the frequent repair costs. Therefore, instead of saving money now, you can save money in the long run. Yes, the upfront cost of ISO certified TMT bars might be high, but you can rest assured that they will serve you better. After all, ISO certified TMT rebars are fully capable of handling many stresses. This blog will pit ISO certified TMT rebar against non-certified alternatives and give you a clear answer.
Quality of ISO Certified TMT Rebar and Non-Certified Ones
Let’s start with the quality difference between ISO certified and non-certified TMT rebars. At first, they might seem like working fine. However, such TMT rebars do not follow the standardized manufacturing process. To save cost many manufacturers take shortcuts in the production process. This, of course, leads to compromised structural integrity. Which you will encounter later down the line in the developing cranks and damages to your structure.
On the other hand, TMT bars that are ISO certified indicate that they are manufactured in the right process. While also passing certain important standards set by the government. ISO certification is a globally recognised standard. Furthermore, ISO certification numbers like ISO 6935-2:2019, ensure that the steel used in rebars meets precise chemical composition, mechanical properties, and quality parameters. Therefore, as you can see in terms of quality ISO certified TMT rebar is certainly superior.
Strength and Durability
The non-certified TMT bars vary in terms of strength and durability, due to cost-cutting in the manufacturing process. Inconsistent tensile strength leads to premature failure due to potential structural weakness. Thus, non-certified rebar under stress, poses extreme risks, especially in earthquake-prone or high-load environments. On the other side, ISO certified rebar is made through an advanced manufacturing process. They also go through a rigorous testing process which ensures that the TMT rebars have high tensile strength, toughness, and better elongation properties. Thus, due to ISO certified TMT bars having uniform strength, engineers prefer using them. Especially in the construction of high-rise buildings, bridges, and industrial facilities.
Corrosion and Fire Resistance
Due to poor steel quality, non-certified TMT rebars are poor in both corrosion. Therefore, a building that has been made with such TMT bars will show structural weakness to water or other corroding substances when in contact. Such TMT bars rust faster and cause more damage to the building’s core structure. Furthermore, in case a fire hazard occurs, non-certified steel bars just won't be able to handle high temperatures due to bad fire resistance. This fatal weakness may cause the entire structure to collapse, even claiming lives in the process.
On the contrary, ISO certified TMT bars have a superior outer layer on the surface that is formed during the manufacturing process, providing them with enhanced corrosion resistance. Thus they are used more in moisture and saline areas for their resistant properties. Additionally, their manufacturing process involves controlled water-cooling or quenching, which imparts excellent fire-resistant properties. They can withstand up to 600°C of high temperatures.
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Final Results
So what did we learn from all of this? Well, you can try to save your money initially by purchasing non-certified alternatives. But, in reality, only ISO certified TMT rebar offers better protection during fire accidents but also better rust resistance. Such TMT bars ensure longer life and reduced maintenance costs than the non-certified steel bars. Certified TMT rebar is stronger, more durable and of high quality due to its advanced manufacturing.
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