RCC slab construction cost for 1800 sq ft

● How to calculate RCC slab construction cost for 1800 square feet and also calculate quantity of cement sand and aggregate and what is cost per square feet concrete slab in India

● Description:- RCC slab construction cost for 1800 square feet ,for the roof cast of 1800 square feet building roof slab, you have require Steel bar ,sand, cement and aggregate ,how we calculate quantity of cement, sand, Steel bar and aggregate required ,you know that for the casting of roof slab we used M20 mix concrete.

●M-20 mix Concrete:-

In M20 mix concrete M is stand for mix and numerical figure 20 is stand for characteristic of compressive strength 20N/mm2 after mixing and casting of roof slab, quantity of material in slab formation it calculated by M20 mix in which ratio of sand cement and aggregate is 1: 1.5 :3

Roof slab

●M-mix Ratio :-1 : 1.5 : 3 in which one part is cement 1. 5 part is sand and 3 part is aggregate

● Steel bar calculation:- In roof slab there is a two types of Steel bar used main bar and cross bar:-

      1) Main bar:- it is also called as shortist span bar usually used at bottom of slab having spacing 4 inch between the two bar, main bar used in shorter direction having 10 mm dia of Steel bar.

     2) Cross bar:- it is also called as longer span bar or distribution bar mainly used at top of the main bar, cross bar usually dia of 8mm Steel bar used in longer direction.it has Centre to Centre spacing is 5 inch in between two Steel bar

● Given dimensions:-

        Thickness of slab=5″

        Length of slab =45′

        Breadth of slab=40′

        Area of slab =45’×40’=1800 sqft

      M -20 -mix =1:1.5:3 (concrete)

Roof slab

●Volume Calculation:-

   1) wet volume=Area × thicknessof slab

     Vw= 1800 sqft× 5′

    Vw= 1800sqft×5/12′

    Vw =748.80 cft

     If you want to convert it into cubic metre you should divide by 35.3147

   1m3 =35.3147 cft

   Wet volume=748.80/35.3147=21.204 m

●How to calculate material required for roof cast of 1800 square feet building

●How to calculate material required for roof cast of 1000 square feet building

●How to calculate weight of Steel bar of different size

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#How to calculate weight of rectangular shaped Steel bar

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#How to calculate weight of square tube shaped Steel bar

#How to calculate weight of square shaped Steel bar

2) Dry volume:- we know that wet volume have water and bubbles it can be remove by vibrator or compressor machine so more quantity of material is required hence dry volume is increased by 54 percent of wet volume , so we can multiply 1.54 in wet volume to calculate dry volume

      Vd =1.54 ×21.204 m3

     Dry volume=32.654 m3

●Weight calculation of Steel:- quantity of steel required in roof slab is about 0.5℅ to 1% of dry volume then average is 0.75% of dry volume

  Weight =0.75%of dry volume×density of steel

     Density of steel is=7850 kg/m3

  W =0.75/100×32.654m3 ×7850kg/m3

     Weight=1922.50 kg

So  weight of Steel bar is require for 1800 square feet Roof slab= 1922.50kg

 If Market rate of steel bar is 60 rupees per kg then

 total cost of Steel bar =1922.50×rs 60

    Total cost= Rs 115350

●Sand Calculation:-

 In M20 ratio of sand cement and aggregate is 1:1.5:3 ,in this ratio 1.5 part is sand

 Total proportion =1+1.5+3=5.5

 Volume of sand in cft

    Volume =1.5 /5.5×32.654×35.3147 cft

    Volume of sand =314.499 cft

If market rate of 80 rupees per CFT then total cost of quantity of sand

Total cost =rs80×314.498

                =Rs 25159

●Cement calculation:- in M20 mix 1 part is cement quantity

Weight of cement=1/5.5×dry volume in m3×density of cement

     Density of cement=1450kg/m3

Weight =1/5.5×32.654 m3×1450 kg/m3

            =8608 Kg

1 bag cement =50kg

No.of bags =8608/50

                    =172.17 Bags cement

If market rate of cement is 350 rupees per bags then total cost

Total cost =172.17 ×rs 350

           = Rs 60259

●Aggregate Calculation:- in M20 mix there is 3 part of aggregate quantity

   Volume of aggregate=3/5.5×dry volume in CFT

Volume =3/5.5×32.654×35.3147 cft

Volume =628.999cft

If market rate of aggregate is is 70 rupees per CFT then total cost of aggregate

Total cost =rs 70×628.999

           Rs=rs 44029.43

● total cost of material:-

   Cost of steel=rs 115350

Cost of cement=rs 60259.50

Cost of sand=rs 25159

Cost of stone=rs 44029.43

Labour charge and machine cost =rs 90000 (approx)

 Total cost=Rs 314799.35

Hence total cost of roof slab of 1800 square feet building require rs 314799

●Now your turn:-  please like and comment it above this post, if you have any query and question about this please you will ask, thanks a”lot.