RCC stands for Reinforced Cement Concrete, in which cement concrete is reinforced with steel bars. The main structural members of the buildings like slabs, beams, columns, and foundations that are constructed up of reinforced cement concrete.
The major difference between R.C.C and Plain cement concrete is that Plain Cement Concrete does not carry Steel but Reinforced Cement Concrete carry steel in it. And other differences are as follows:
PCC is weak in tension loading while good in compression loading whereas RCC is good in compression loading as well as tension loading
Purpose of Reinforcement in Reinforced Cement Concrete
Concrete has a very huge compressive strength, but it has less tensile strength.
Thus, when only the compressive loads are acting on the concrete surface, then there is no need for reinforcement in it.
But where tensile forces are also elaborated, as in beams and slabs, there is a very huge risk of its collapse when plain concrete is utilized.
Steel has a very high tensile strength and also has good compressive strength.
when these two concrete and steel are mixed with each together, a material of construction becomes capable of resisting all the 3 types of forces that act upon a structure, i.e., compressive loads, tensile stresses, and shear forces. Such material is called as Reinforced Cement Concrete.
It has been extremely useful and reliable in the engineering project.
Nature of Reinforced Cement Concrete:
The major principle used in the construction of the reinforced cement concrete is to make a structural material in which
(i) Steelwork is used for the purpose of bearing the tensile stresses;
(ii) concrete is used to bear the compressive forces, both acting in complete simultaneously.
Types of Reinforcement used in R.C.C:
Reinforcement utilized in concrete is made of steel of different types.
Some types of reinforcement are:
(i) Mild Steel Bars:
These come in different diameters and are needed to hold a characteristic strength in tension which is given in relevant codes.
This steel bar is used as reinforcement which can be often bent easily without cracking at the bends.
(ii) Hot Rolled Bars and Cold Worked Bars:
They are remarkably constructed reinforcements. The first one has a usual strength in tension which is double than mild steel bars. These come commonly in thick sections.
They can be bent by heating up to 100°C without any defects. This is not possible with the other mild steel bars. Similarly, the cold-worked steel bars come in twisted or stretched forms having elongated ribs or such structures along their length.
They have a higher characteristic strength of 425 N/mm2 against 250 N/mm2 for mild steel bars. Such bars cannot be heated for bending and re-bending purposes.
(iii) Steel Fabric:
This is made from different bars and wires. This contains plain round wires, notch, and deformed wires, deformed steel bars of cold-worked type. The mesh from the wires is constructed by welding together straightened lengths very carefully and strictly in accordance with the specifications. Otherwise, the mechanical properties of reinforcement may be affected adversely.
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