REINFORCED CEMENT CONCRETE

 

What is RCC ? Why do we R/F Plain Concrete ?

RCC full form is reinforced cement concrete, which is a composite material made from concrete and steel reinforcement. The concrete is weak in tension and strong in compression. Therefore, Steel reinforcement is added in concrete to improve its tensile resistance.

In the civil engineering field, concrete is a material made of Cement, Sand, Mortar, Admixture, etc, and has a different grade based on strength. As we know that concrete is can resist compression very well, but is very weak in resisting tension. Hence reinforcements are introduced in the concrete wherever higher tensile stress is expected.

 

Advantages of RCC over other Construction Materials.

◦        Strength : R.C.C. has very good strength in tension as well as compression.

◦        Durability : R.C.C. structures are durable if designed and laid properly. They can last up to 100 years.

◦        Mouldability : R.C.C. sections can be given any shape easily by properly designing the formwork. Thus, it is more suitable for architectural requirements.

◦        Ductility : The steel reinforcement imparts ductility to the R.C.C. structures.

◦        Economy : R.C.C. is cheaper as compared to steel and prestressed concrete. There is an overall economy by using R.C.C. because its maintenance  cost is low.

◦        Transportation : The raw materials which are required for R.C.C. i.e., cement, sand aggregate, water and steel are easily available and can be transported easily. Nowadays Ready Mix Concrete (RMC) is used for faster and better construction. (RMC is the concrete which is manufactured in the factory and transported to the site in green or plastic state).

◦        Fire Resistance : R.C.C. structures are more fire resistant than other commonly used construction materials like steel and wood.

◦        Permeability : R.C.C. is almost impermeable to moisture.

◦        Seismic Resistance : Properly designed R.C.C. structures are extremely resistant to earthquakes.

What are the factors affecting on which composite action of steel and concrete in RCC ?

◦        The composite action of steel and concrete in a reinforced concrete section is dependent on the following important factors :

◦        The bond between steel and concrete.

◦        Prevention of corrosion of steel bars embedded in the concrete.

◦        Practically equal thermal expansion of both concrete and steel.