hey guys welcome to we civil engineers in
this video I am going to teach you how
to calculate quantity of cement sand and
water in a mortar of 1:4 ratio
I am assuming the volume of water
is one meter cube and as we know that
mix ratio is 1 is to 4 here 1 is the
cement and 4 is the sand
Dry volume of the motor equals to wet volume multiplied
by 1 point 3 3 here 1.33 is a
multiplication factor and it can change
from 1.30 to 1.35 you can take anything
like 1.31,  1.32, 1.33, 1.34 and 1.35. 
this is due to package option therefore
try volume equals to 1 multiplied by 1
point 3 3 which is equals to 1 by 3
meter cube now we will see the quantity
of cement to calculate the quantity of
cement we have to remember this full
formula that is the volume of moto x
cement ratio and divided by sum of the
ratio and we know the dry volume of
mortar and we know the ratio of cement
and sand so substitute the values when
when 3 3 x 1 divided by cement ratio
i.e., 1. plus sand ratio i.e., 4
or a pen 3 they divided by 5 which gives
us value is 0.26 6 meter cube
as we know that density of the cement is 1440 per meter cube.
if you multiply this density with the volume then you
will get the weight of the cement.
I.e., 1400 and party x 0.266 which is equal
to three hundred and eighty three point
zero 6 kg and we know that one bag of
cement contains 50 kg of cement if you
divide this value with 50 then you will
get the number of bags that is seven
point six six one numbers now let's say
the quantity of sand to calculate the
quantity of sand we have to multiply the
quantity of cement with four because
cement and sand are in the ratio of 1:4 therefore quantity of sand equal
to 0.266 meter cube x 4 if you multiply
this two values then you will get it is
one point zero six four meter cube since
we know that one meter cube equal to 35
by 3 1 4 7 cubic feet to get the volume
of the sand in cubic feet we have to
multiply this value with 35 and 3 1 4 7
then we will get it as 37.574 cubic feet 
to get the weight of the
sand we have to multiply the density of
the sand with the volume of the sand in
meter cube i.e., 1.064 x
1 9 2 0 that is density of sand then you
will get it as 2042.88 kg and 
if you divide it by thousand then you will get
it as 2.0428 tonnes 
now let's see the quantity of water considering water
cement ratio is 0.5 0 we know the water
cement ratio and we know the weight of
the cement to get the weight of water we
have to multiply weight of cement with
water cement ratio that's what I did
here 383.04 multiplied by 0.5
which is equal to 191.52 kg 
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