Calculate quantity of cement & sand requirement for plaster

Calculate quantity of cement & sand requirement for plaster?????

Dear friends today we discuss about a new topic i.e. Calculate quantity of cement & sand requirement for plaster?

In site work, we have to submit our requirement before our execution. So for this we calculate our requirement quantity before execution. Let's see how we calculate our required quantity of cement & sand for plaster work.

Question-

Area of wall is 1 sqm, mortar ratio is 1:4 & thickness of plaster is 10 mm, Calculate the quantity of cement & sand for plastering?

Data given-

Area of wall = 1 sqm

Thickness of plaster =10 mm or 0.01 m

Ratio=1:4

Solution-

First we calculate our plaster volume i.e. (area of wall*thickness of plaster)

                                                                  = (1*0.01) = 0.01 cum

Sum of ratio = (1+4) =5

         Cement            Sand

 5 =        1               4
 1  =.    (1/5)           (4/5)

1.33 =    (1/5)*1.33      (4/5)*1.33    

( when we calculate our quantity it is in dry condition, but when we work we add water in it, after adding of water the mix of cement & sand get shrink by it's volume, so for this we add 33% to 35% to get the exact quantity)

         Cement            Sand
1.33 =  (1/5)*1.33       (4/5)*1.33 

1.33 =  0.226            1.064

1.33 =  0.226*1440       1.064*35.3147 

(unit weight of cement =1440 kg/cum, 1 cum= 35.3147)

              Cement           Sand
If 1.33 =     325.44 kg       37.574 cft

so 0.01 cum = 325.44*0.01     37.574*0.01

0.01 cum =    3.25 kg         0.376 cft

So, 3.25 kg cement & 0.376 cft sand required for 0.01 cum plastering.

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