How to Calculate Quantity of  Concrete | Cement , Sand and Aggregate |

In this article today I will discuss about how we can find out the quantity of cement , sand and aggregate method. because we have different object and those objects have different shapes therefore the volume must change from each other. so after this  reading you will be able to find out the volume of different object and also the quantity of concrete for different shapes.

Out Volume of Different shapes

we know that if we want to find out the quantity of concrete so that concrete we can find out with help of object volume. so there we need to find out the volume of any shapes in which we have to find out the quantity of concrete or (Concrete volume)

Method to find out volume of  Box

we can get the volume of any object from 3 dimensions Like  L (Length) x B (Breadth) x H ( Height) so there 3 dimension can give us the volume of any object or shapes.

Method to find out volume Cylinder

In cylinder shapes we can find out the volume very easy , first of all we have to measure the Diameter of cylinder (D) and than Height of cylinder (H)  Now, from Diameter of cylinder we can find out area of cylinder from  top . we use this formula for cylinder area  A = pi D 2/4  = ?

Now to find volume of cylinder  = V = A x H    ,    here V = volume , A = area of cylinder  , H = height of cylinder.

To find out Quantity of  Concrete ( Cement , Sand and Aggregate )

We have different Grade of Concrete and different Grade of concrete has different ratio for Cement , sand and Aggregate which are given below.

M10    Ratio   1: 3 : 6               Here   1 is cement , 3 is Sand and 6 is Aggregate

M 15    Ratio   1: 2 : 4              Here   1 is cement , 2 is Sand and 4 is Aggregate

M20    Ratio   1: 1.5 : 3              Here   1 is cement , 1.5 is Sand and 3 is Aggregate

M25      Ratio   1: 1 : 2             Here   1 is cement , 1 is Sand and 2 is Aggregate

Density of Materials.

Cement – 1440 kg/m3

Dry Sand – 1540 to 1600 kg/m3

Aggregate – 1560 to 1600 kg/m3

One thing keep in your Mind When you found the volume of any shapes to that volume will be the volume of concrete But that Volume will be Wet volume of concrete and than we will convert it to dry volume , ( Because we bring the dry volume of materials from market for construction), So we have the given procedure to convert the wet volume to dry volume.

Convert Wet Volume to Dry

Dry Volume = Wet Volume + 54% of wet volume

Dry Volume = Wet Volume x 1.54

How to calculate quantity for 10 cubic meter concrete

We have been given Grade – M15 and we have to calculate the quantity of cement, sand and aggregate in cft, cum and kg.

Volume = 10 cubic meter (Now this is the Wet volume ) change it to dry volume.

Dry Volume of Concrete

This is wet volume, so we need to convert it into dry volume.

Dry volume = wet volume x 1.54 = 10 x 1.54 = 15.4 cubic meter

We know that the ratio for M15 is 1:2:4

Actual volume = Dry volume/Sum of M15 ratio = 15.4/1 + 2 + 4 = 2.2 cubic meter

Quantity of Cement / Cement Bag No’s

Actual volume x cement ratio = 2.2 x 1 = 2.2 cubic meter

Actual volume x cement ratio x 35.32 = 2.2 x 1 x 35.31 = 77.68 cubic feet

Actual volume x cement ratio x density = 2.2 x 1 x 1440 = 3168 kg

Actual volume x cement ratio x 28.8 = 2.2 x 1 x 28.8 = 63.36 bag

calculate sand and aggregate quantity

Actual volume x sand ratio = 2.2 x 2 = 4.4 cubic meter

Actual volume x sand ratio x 35.31 = 155.36 cubic feet

Actual volume x sand ratio x density = 2.2 x 2 x 1540 = 6776 kg

Aggregate

Actual volume x Aggregate ratio x 35.31 = 2.2 x 4 x 35.31 = 310 cubic feet

Actual volume x Aggregate ratio x density = 2.2 x 4 x 1600 = 14080 kg    

Actual volume x Aggregate ratio = 2.2 x 4 = 8.8 cubic meter

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