Engineers build leaving a wide berth of safe loading capacity to construct, let’s get a brief view on how the same is for steel reinforcement bars. We have talked enormously on safety codes listed in IS 1786:2008, in the manufacture of reinforcement bars. Now, let’s discuss how safe loads are calculated in a construction material like reinforcement bars. The min. yield strength a reinforcement bar should have is easily inferred from the grade of the reinforcement purchased. Grade Fe 415 having a min. yield strength of 415 N/mm2, similarly for grade Fe 500 having min. yield strength of 500 N/mm2 and Fe 550 with min. yield strength of 550 N/mm2, so goes for every steel reinforcement grade.
We have been talking about the pros and cons of steel and concrete as a construction material. Let’s get a better understanding on why they work better together. Anyone reading about construction materials would have come across the saying – Concrete is good against compression, but weak in tension whereas steel bars are good in tension, but weak in compression. What a few had inferred from the statement is that, steel is naturally weak in the face of compressive forces, which is not the case. Steel is good in both compression and tension. Steel bars or steel reinforcement bars are weak in the face of compressive force due to their dimensional property. Steel reinforcement bars have an insignificant cross sectional area when compared to the length of the steel bars, and thus the ability to withstand compressive forces are naturally less.
The construction of a commercial or residential building cannot be imagined without the use of concrete and steel. These two components are the most essential composite in the construction field. The reasons why they are preferred is their advantages in terms of strength and withstanding the loads. However, what if a comparison was made between concrete and steel. To see which one tops the other in terms of certain parameters.
So, which material surpasses the other in the field of construction – concrete or steel?. We know that both are important for constructing a structure but let us find out what these two materials are capable of.
From the previous blog Part-I of this series, the concept of underwater concreting and how it became the preferred concreting method for construct structures whose foundation is laid on water. The main advantage of underwater concreting is that it prevents the issues of washout by the addition of addictive components.
With the emergence of better technologies, techniques for underwater concreting has become innovative and has led to the discovery of better methods which will be explained in the following section.
We all know that concrete is the vital material needed for the construction of any man-made structures. Without concrete, literally, no construction of buildings, bridges, dams and other structures etc is possible. Concrete is known for its incredible compressive strength.
Normally concrete is used in constructing buildings whose foundations are built on the land but during the construction of structures like bridges, dams etc, the foundation part of the structure lies underwater, therefore in these cases, underwater construction is the only possible method.
When it comes to bridges or any other man-made structures like buildings, they all have an estimated lifetime after which they start to show signs of wear and tear. However, the signs can be delayed for much longer if the structure is given proper periodic maintenance and the construction of the structure using quality materials.
With the emergence of innovative ways and materials in the construction field, it is currently possible to build structures that are more strong and durable than the ones constructed long before. But even the newly constructed structures are collapsing after or during the construction phase but some of the old ones still stand intact, therefore, this raises a question about the integrity of the structure.
Steel is an indispensable part of construction. The possibilities presented by steel in the field of construction is not just limited to steel sections, but also as steel bars as reinforcement to cement concrete in construction of structures. The story of steel as a reinforcement presents a picture of innovation in the field of construction. Starting as iron as reinforcement to structures, to highly ductile mild steel to deformed bars (High yield strength deformed bars) and finally to thermo mechanically treated (TMT) steel bars, showcase an evolution of steel reinforcements to keep up with the needs presented by humans in the field of construction.
Corruption in both public and private undertakings is not an unusual or uncommon scenario for a resident in a country like India. The dangers of corruption for unlawful gains have lead to disaster, of which collapse ——– was discussed in —- blog. But ever wonder why not every structure or construct you have known where corruption has eaten up quality is still functioning as its supposed to. It’s not just God’s grace, but a large part of its credit goes to the Engineer who made the plans and necessary load calculations for the construct. So why do they make such calculations. On planning structures, an engineer has to calculate structural load which comprises of both dead loads and live loads acting on it, and also the environment loads and much more. This is so especially in cases of bridges and structures where live loads are more prominent. In this blog we will be discussing more on how loads are calculated for buildings.
Cyclone, as described by the meteorology is a large scale air mass that rotates around a strong centre of low atmospheric pressure. Well, so is typhoons and hurricanes. Cyclones, typhoons and hurricanes are the same phenomenon, but are known differently in different parts of the world. With Odisha in the wake of a massive cyclone Fani and the world in discussion of the recurring and ever strengthening cyclones observed around the world as a man made disaster in the era of ‘humans’, let’s talk on how to build to survive the cyclones and not just let our homes be another matchstick on fire.
The construction of buildings is quite innovating and are truly a marvel. When we compare the current timeline with the ancient timeline, we can see that the number of buildings has risen tremendously over the centuries. With time, different types of innovations in constructions were introduced. This resulted in the construction of better, stronger and taller buildings that are safe to live in.