Reinforced Cement Concrete: -
Concrete is a composite
material - a cement matrix with aggregates for reinforcement - that works well
in compression, but not under tension. We can solve the problem in which wet
concrete is poured around strong, steel reinforcing bars (tied together to form
a cage). When concrete hardens to set around bars, we get a new composite
material, reinforced concrete (also called
reinforced cement concrete or RCC), which works well under tension or
compression i.e.concrete resists squeezing (provides compressive strength),
while steel supports bending and stretch (provides tensile strength). In fact,
reinforced concrete is using one composite material inside the other which
indicates that concrete becomes matrix while steel bars or wires provide
reinforcement.
Reinforced concrete, or
RCC, is concrete that consists of embedded steel bars, plates, or fibers that
reinforce the material. The load carrying capacity has been increased by these
materials, and because of this RCC is used extensively in all construction. In
fact, it has become the most used construction material.
Advantages of reinforced concrete:-
- Fire and weather resistance of reinforced concrete is reasonable.
- Due to the reinforcement provided, reinforced concrete can also withstand a good amount of tensile stress.
- Reinforced concrete has a higher compressive strength than other building materials.
- Reinforced concrete as a concrete material, can be economically moulded into an almost infinite range of sizes.
- The maintenance cost of reinforced concrete is very less.
- The reinforced concrete building system design is more durable than any other building system designs.
- Reinforced concrete is the most economical construction material such in the structures like footings, dams, piers etc..
- As reinforced concrete can be moulded to any shape required, it is widely used in precasted structural components. This yields rigid members with minimal apparent deflection.
- Compared to the use of steel in the structure, reinforced concrete requires less skilled labour to construct the structure.
- It acts like a rigid member with minimal deflection.
Disadvantages of reinforced
concrete:-
- Mainly the tensile strength of reinforced concrete is about one-tenth of its compressive strength.
- The main stages of using reinforced concrete are mixing, casting and curing. These all affect the ultimate strength.
- The cost of the forms used for casting is relatively high.
- RCC column section for a multi-storey building is larger than the steel section because of its lower compressive strength.
- Shrinkage causes development of cracks and strength loss.
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