How to calculate exactly the weight of sand cement and water in mix ratio 1:3?

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## poojan

Quantity is calculated for 1 Cu.m of mortar:## fathima

the quantity calculated for 1m3 mortar

the ratio is 1:3 for cement and sand

assume shrinkage factor 1.33

now we can calculate for cement for 1m3 mortar=1*1.33*1/4

=0.3325m3

50kg cement bag volume=50/1440=0.0347m3

so cement weight=0.3325*50kg/0.0347=479.1kg

add 10% wastage=479.1+47.91=527.01kg

sand volume=1*1.33*3/4=0.9975cum

add 10% wastgae=0.9975+0.0997=1.0972cum

now assume water-cement ratio=0.6

so water =0.6*527.01=316.2kg=316.2ltr

## aviratdhodare

Since you have not mentioned whether the 1:3 cement sand mortar is as per weight batching or volume batching, here I’ll describe the process for both the types.

Weight batching:

Quantities of different constituents are,

If the sand used for this mix contained adsorbed water equal to 5% of weight of sand, the calculations would change as follows:

Quantities of different constituents are,

Volume batching:

Quantities of different constituents are,

If the sand used for this mix contained adsorbed water equal to 5% of weight of sand, which also caused bulking of sand volume by 20% the calculations would change as follows

Quantities of different constituents are,

## Komal Bhandakkar

This answer was edited.## Weight of different ingredient of Mortar 1:3 –

Thank You.