Part-I and Part-II broadly explained the two alternatives for steel reinforcement. One was Basalt rebars and the other one was Bamboo reinforcement. Each of this reinforcement techniques has their own advantages and features that are equal to or more than steel. But, however, when we look at the construction sector, one thing we can find is that steel reinforcement is still preferred for the construction of building structures.
Why is that so? Even with alternatives that offer certain advantages more than steel, well there are certain challenges to overcome for effectively using these alternatives.
Even with the better advantages, these alternatives also pose certain challenges that make it the prime reason why they are not much commonly used as steel reinforcement. Alright, let’s get to the points.
Basalt rebars are one alternative for steel reinforcement. It has more tensile strength, much lighter etc, but what makes it a challenge is its flexibility. Basalt rebars can only be bent by using machine bending. In construction, steel is usually bent at onsite by unskilled workers. Also, in India, construction processes are labour intensive which is one reason why steel reinforcements are preferred for construction. Another reason that can be attributed is the cost as there are only less industries that produce Basalt Rebars in India, therefore due to low competition, the prices can be quite high.
When we look into Bamboo reinforcement, we have seen that it also offers more tensile strength than steel and other advantages, but like the basalt rebars, bamboo reinforcements have certain challenges. Contraction and expansion of bamboo is one such challenge, which is caused by both temperature changes and water absorption. The grass is also susceptible to structural weakness that is caused by fungus and simple biodegradation. A biological attack such as decaying is the most critical concern for bamboo. There are certain factors that make bamboo more prone to decay which are:
- Thin-walled geometry
- High starch content
- An absence of decay-resistant compounds
The current reinforcement
Overcoming these challenges for the alternatives will take time and effective measures, but until then steel will be the preferred component for reinforcement in the construction sector. The need for alternatives are always welcoming but to efficiently ensure its success, the challenges must be addressed.
Our last blog described on steel reinforcements and its multiple benefits to the construction sector, also, the concept of alternatives was explained. Even one such alternative namely the Basalt reinforcement was briefly explained along with its advantages. When compared to steel, basalt reinforcement bars or rebars had more tensile strength and was much lighter than steel. Well, another alternative reinforcement technique is Bamboo reinforcement.
For the past 100 years, reinforced steel bars have been dominating and still dominates the construction industry. The prime reason for that can be attributed to the properties of steel itself which is it’s high tensile strength and ductility ratio. Along with that steel has an almost similar thermal coefficient of expansion to that of concrete. There are many other advantages such as recycling that makes steel the preferred choice for reinforcement of building structures.
Reinforced cement concrete, simply RCC is the preferred standard for constructing building structures. The concept of RCC was introduced by Joseph Monier in the late 19th century. Reinforced cement concrete is primarily used in structures to provide the tensile strength that the concrete is weak to handle. Due to the excellent tensile strength handling and similar thermal coefficient of expansion between steel and concrete, RCC remains as the de facto component in the construction of a building.
The introduction of reinforcement drastically changed the phase of construction of building structures of steel. Reinforced steel provided the necessary tensile strength which the concrete lacks. Today, very few constructions are done without using reinforced cement concrete. At the current scenario, the most used reinforced steel bars are the Thermomechanically Treated (TMT) steel reinforced bars. They are preferred for their excellent tensile strength and optimum ductility. The TMT steel bars are of different grades namely Fe 415, Fe 500, Fe 550 and Fe 600.
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
When it comes to constructing a building structure, the right set of resources must be used for ensuring the overall life and the integrity of the building. The introduction of reinforcement in construction improved the overall life expectancy of the structure and made them strong enough to withstand the forces of nature. Steel is the primary component used as reinforcement because of its excellent tensile strength, recyclability and similar thermal coefficient of expansion to that of concrete.
Natural disasters are usually one of the troublesome challenges for building structures to overcome particularly, the reinforced steel. Natural disasters are of many types, but the most common disaster occurrence in our country are earthquakes. There are many scenarios of structural collapses due to earthquakes. Although the causes can be attributed to several factors such as the age of building structure, lack of maintenance etc, the most important factor to be attributed is the ductile nature.
The Part-I of this blog explained about the two most important factors to be considered in a TMT steel reinforced bar which was Tensile strength and Ductility. Also, a brief introduction of Ductility was described. The hot and soft inner ferrite-pearlite core is responsible for endowing the reinforced bar with optimum ductility. The ductility is not something that should be neglected. It is an integral part of handling the forces or loads of a building structure.