This article is about how to calculate the quantity of cement, sand, and aggregate in the concrete columns. after reading this article you will be able to find out the materials in slab, beam and also for Concrete road. We used here the same formula for finding out the quantity of beam and slab etc. But there just change the shape and dimension, otherwise, it is the same thing.

Given Data for Square column:

this is the top and front section of the column.

Size of column = 300 mm x 300 mm

Height of column = 3 meter.

In this column, we will use the M20 grade of concrete (which Ratio is 1:1.5:3) sum of ratio become = 5.5

where: 1 is Cement, 1.3 is Sand, and 3 is aggregate. ( M20 grade of concrete compressive strength is 20N/mm2 after 28 days).

Now we have to find out Volume of Column = V = L x L x H = 300 x 300 x 3000 = 0.27m3

Remember the above volume of column is Wet volume now we will convert it to dry volume which can be obtained by multiplying 1.54.

Dry volume = wet volume x 1.54 =  0.4158 m3

Now from this dry volume, we can find out the volume of cement, sand, and aggregate in the concrete column.

1- Volume of cement = V = 1/5.5 x dry volume

= V = 1/5.5  x 0.4158

= V = 0.0756 m3

Now convert the cment volume to bags.

Volume of cement / Volume of one cement bag in m3

Note : Volume of one  cement bag = 0.0347

0.0756 / 0.0347 =  2.17 bags of cement are required for above column.

2- Volume of Sand = V = 1.5/5.5 x dry volume

= V = 1.5/5.5  x 0.4158

= V =  0.1134 m3

3- Volume of Aggregate  = V =  3/5.5 x dry volume

= V = 3/5.5  x 0.4158

= V =  0.2268 m3


Note: If you want to find out the number of materials in the circular column so in the circular column we have a different formula to find out the volume of the column for materials suppose: if we take the Dia of circular column 1ft then we can use the given formula to find out column volume. so first we need to find the area of the circular column and then the volume of the column.

Area formula for the circular column. A = π r²          or      A = (π/4) × D2

Volume formulas for a circular column:

V = A x h was A for the Area of the column and h for the height of the column. After finding the volume we can use the same formula as in the square column to find the materials in the RRC column.

For more information watch this video

Click Here To See Steel Bars Over-Lap Formulas Used In Column, Slab And Beams

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