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What is the difference between plain and reinforced concrete?

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Asked: September 25, 20202020-09-25T09:14:38+05:30 2020-09-25T09:14:38+05:30In: Concrete
nikeetasharma
nikeetasharma

nikeetasharma

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Differentiate between plain and reinforced concrete. Among these to which one gives more strength?

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  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    2020-09-25T16:05:03+05:30Added an answer on September 25, 2020 at 4:05 pm

    Concrete is the basis of much of Civilization’s Infrastructure and much of its physical development. It is almost twice as much concrete is used throughout the world than all other building materials combined use.

    Difference between PCC and RCC:

    PLAIN CEMENT CONCRETE (PCC): – It is also called Cement Concrete (CC) or Binding Concrete.

    This is a construction material which consists of Cement, Sand, Aggregate (Coarse and Fine) , Water and Admixtures.

    · It is used for providing a rigid, level space and impervious bed to RCC in foundation.

    · It is also used under flooring (stone, tile, wooden flooring etc., ).

    · It is good at resisting compression.

    · It can be used over Brick flat soiling or without Brick flat soiling.

    · It is also used as filler like lump concrete which is mixer of Boulder and PCC.

    Thickness: PCC is normally between 50 to 75 mm

    Concrete Ratio: Normally used proportions are 1:2:4, 1:3:6, 1:4:8

    Unit: Cubic Meter (Cum)

    REINFORCED CEMENT CONCRETE (RCC) :-

    Concrete is material with a mix of Cement, Sand, Aggregate and Water, that is good for Compression not in Tension….

    To resolve this critical issue by reinforcing steel, by casting wet concrete around strong steel bars. When the concrete set and hardens around the bars, we get a new composite material, REINFORCED CONCRETE (RCC). So it is a good material which works good either in Compression or Tension.

    Concrete resists squeezing due to compressive strength and Steel resists bending and stretching due to tensile strength. This enhance ductility, reduce long term deflections or increase the flexural capacity for beams.

    Reinforced concrete acts as a composite material inside another where steel bars provide the reinforcement to the concrete.

    Usually TMT Steel bars are used which are firmly anchored inside the concrete without the risk of slipping. We use steel because it prevents excessive cracking resulting from shrinkage or temperature variation (hot and cold temperature) . Lateral reinforcement as ties and stirrups are used to provide resistance to principal tensile stresses resulting from shear resistance.

    Thickness: RCC thickness depends as per design requirements.

    Concrete Ratio: It can be nominal mix or design mix, depends on site requirements.

    Unit: Cubic Meter (Cum)

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  2. aviratdhodare

    aviratdhodare

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    2020-10-26T21:47:57+05:30Added an answer on October 26, 2020 at 9:47 pm

    Basic differences

    PCC RCC
    Plain Cement Concrete R/f Cement Concrete
    It doesn’t carry ‘Steel’. It carries Steel.
    PCC is weak in tension loading while strong in compression loading. RCC is strong in both.
    PCC blasts on excessive loading & in an instant w/t giving any warning. RCC gives you enough time to vacate the structure before collapse.

    What is PCC DPC and RCC in civil engineering | RCC and PCC

      Plain Cement Concrete R/f Cement Concrete
    Tension Steel tendons

    High tensile steel bars

    Included with tension

    Ordinary Mild Steel Deformed Bars

    No tension included

    Basic materials used Min grade of concrete

    Post-Tensioning → M30

    Pre-Tensioning  → M40

    to resist high stresses

     

    High strength steel to transfer large prestressing force

    Min grade of concrete → M20

    Steel                           → MS

    Effectiveness of member Entire section carries load Does not carries load
    Crack resistance High

    Cracks don’t occur under working loads

    Less
    Wt & suitability Light

    Heavy loads & longer spans

    Heavy

    Wt is more desired than steel

    Equiments Requires many specialized equiments

    Pulling jack, Post-tensioning pump, Master wedges, Anchhor head & bearing

    Doesn’t involve specialized equiments.
    Quality of steel reqd 1/3rd of RCC

    More strength & less c/s area

    More
    Deflection Very less More
    Load carrying capacity & Durability More Less
    Shock resistance More Less
    Yield As high as 2100 N/mm2 200 – 300 N/mm2
    Testing Testing of steel & concrete can be done while prestressing. No way of testing the steel & concrete.
    Cost Economical for span of 10m – 18m.

    As length of span gets ↑

    Cost % ↑

    C/s area of beam ↓

    Economical for span < 9m.
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  3. Kuldeep Singh

    Kuldeep Singh

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    2020-09-25T16:04:02+05:30Added an answer on September 25, 2020 at 4:04 pm

    Plain cement concrete (PCC) is simply concrete by definition. It is cement + water + fine aggregates + coarse aggregates. It is the ordinary concrete without any kind of reinforcement. However, pozzolans, admixtures, etc. may be included in the mix.

    Reinforced cement concrete (RCC) is PCC + reinforcement. The reinforcement is generally steel bars bent and laid into the desired shape and orientation. The reinforcement can be both tensile or compressive reinforcement depending upon the situation. However, mostly both are used in any structural member. It is rare to find an RCC structure with only either tensile or compressive reinforcement.

    In terms of strength, naturally, RCC is stronger because the reinforcement helps in load-carrying capacity.

    PCC is weaker and is only used for layering surfaces like plastering work or flooring and most importantly in the layering if excavation to cast footings.

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