#R.C.C और P.C.C क्या है ? What is R.C.C and P.C.C ?
Answer :-
(1)R.C.C :-
In Hindi :-R.C.C (आर.सी.सी) का पूरा नाम (पूर्ण रूप) " प्रबलित सिमेंट कंक्रीट " है । सीमेंट, मोटा मिलावा (coarse aggregate), बारीक मिलावा (fine aggregate) और पानी से बने मिश्रण 'कंक्रीट' में जब इस्पात की छड़ों को दबाकर सिविल इंजीनियरिंग के किसी अवयवcomponent) की संरचना की जाती है तो वह प्रबलित सीमेट कंक्रीट या आर. सी. सी. (reinforced cement concrete) कहलाती है।
कंक्रीट की संपीडन सामर्थ्य (compressive strength), इसकी तनन सामर्थ्य (tensile strength) की तुलना में बहुत अधिक होती है। कंक्रीट की संपीडन सामर्थ्य 15 N/mm^2 होती है जो डिजाइन के लिए केवल 5 N/mm^2 ली जाती है । कंक्रीट की तनन सामर्थ्य कंक्रीट की तुलना में 10 से 15% ही होती है, परंतु कक्रीट की तनन क्षमता शून्य मानते हैं। अतः स्पष्ट है कि प्रबलित सीमेन्ट कक्रीट में सीमेंट कंक्रीट तो केवल संपीडन (compression) ही वहन करती है, जबकि तनाव इस्पात द्वारा वहन किया जाता है। अर्थात् प्रबलन का प्रायोजन केवल तनाव वहन करना होता है ।
IN English :-Full form of RCC is "Reinforced Cement Concert "
Reinforced concrete (RC), also called reinforced cement concrete (RCC),
RCC is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. Worldwide, in volume terms it is an absolutely key engineering material.
What is properties of good RCC?
1. It should be capable of resisting expected tensile, compressive, bending and shear forces.
2. It should not show excessive deflection and spoil serviceability requirement.
3. There should be proper cover to the reinforcement, so that the corrossion is prevented.
4. The hair cracks developed should be within the permissible limit.
5. It is a good fire resistant material.
6. When it is fresh, it can be moulded to any desired shape and size.
7. Durability is very good.
8. RCC structure can be designed to take any load.
Uses of RCC ( reinforced cement concrete)
RCC is a widely used as building material in construction of all structural member of Industrial and residential building part like footing, column, beam and slab and also some of others structure like building of bridge, dams, water tanks, stairs, bunkers etc.
Some of its important uses of rcc are listed below:
1) rcc is used as a structural element, the common structural elements in a building where rcc is used are:
(a) Footings (b) Columns
(c) Beams and lintels (d) Chejjas, roofs and slabs.
(e) Stairs.
2) RCC is used for the construction of storage structures like
(a) Water tanks (b) Dams
(c) Bins (d) Silos and bunkers.
3) RCC is used for the construction of big structures like
(a) Bridges (b) Retaining walls
(c) Docks and harbours (d) Under water structures.
4) rcc is used for pre-casting
(a) Railway sleepers (b) Electric poles
5) RCC is used for constructing tall structures like
(a) Multistorey buildings (b) Chimneys
(c) Towers.
6) rcc is used for paving
(a) Roads (b) Airports.
7) rcc is used in building atomic plants to prevent danger of radiation. For this purpose rcc wall built are 1.5 m to 2.0 Thick.
(2) P.C.C:-
In Hindi :- P.C.C (पी.सी.सी) जिसे हिंदी में सादा सीमेंट कंक्रीट कहते है। रेत, एग्रीगेट (कपची), और पानी के मिश्रण से बने कंक्रीट को प्लेन सीमेंट कंक्रीट कहते है। इसे सीमेंट कंक्रीट भी कहते । इसमे स्पात (Steel) नही डाली जाती ।
In English :-Plain cement concrete is the mixture of cement, fine aggregate(sand) and coarse aggregate without steel. PCC is an important component of a building which is laid on the soil surface to avoid direct contact of reinforcement of concrete with soil and water.
#Uses of Plain Cement Concrete
Plain cement concrete is generally used for the foundation. However, its other uses are:
Other Uses of Plain Cement Concrete are listed below:
As bed concrete below the wall footings, column footings and on walls below beams.
As sill concrete to get a hard and even surface at window and ventilator sills.
As to coping concrete over the parapet and compound walls.
For flagging the area around the buildings.
To make pavements.
To make tennis courts, basketball courts etc.
Plinth Protection
Storm/ Sewer at drains, small retaining walls.
Limitations:-
Do not mix the materials on bare land.
Do not just-pour the water in materials by means of a pipe. i.e. without any measurement control.
Do not allow the PCC without formwork.
Do not pour concrete without levelling and compacting.
Do not pour concrete in the pit from a height of more than 1.5 m.
Do not allow extra cement mortar on top of PCC. for smooth finishing.
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