HOW TO DO PLASTER CALCULATION | PLASTERING OF MORTAR CALCULATION 

Plaster Calculation :

Plaster calculation by L X B

L= Length

B= Breadth 

Taking the ratio of cement mortar of 1 : 6 proportion :

1 : 6  proportion means, 1 part of cement and 6 part of sand or dry sand ( quarry sand ).

Consider the 1 meter X 1 meter wall surface -

Consider the mortar thickness is 12mm.

So Volume of mortar in plaster = 1 meter X 1 meter X 0.012 meter.

                                                  =  0.012 Cu.m

Dry Volume is = 0.012 X 1.33                                             { because 1.33 is dry factor }

                        = 0.01596 Cu.m

Now,

        Cement = 0.01596 X [(1/7) X1440 ]                            { Cement Density = 1440}

                     = 3.28 Kg  or

                     = 3.28/50 

                     = 0.0656 Cement Bag.

           Sand = 0.01596 X[(6/7) X 35.31                               { Density of sand = 35.31 }

                    = 0.483 Cu.ft      or

sand can also calculation in the proportion of 1:6

i.e., 1 proportion of cement and 6 proportion sand

i.e.,   3.28 X 6 =19.68 Kg.

i.e.,  0.0656 X 6 = 0.3936 Bag.

i.e. ,  0.3936 X 1.226 = 0.483  Cu.ft                                      { 1 Bag of Cement = 1.226 Cu,ft }

Note :

1) This calculation is done for only 1 Sq.m area. You can multiply the quantity and get answer.

2) Cement density is 1440.

3) In one cement bags equal to 50kgs of cement.

4) 1 bag is equal to 1.226 Cu.ft .

5) The plaster is done in both portion inside and outside. The inside plaster is 12mm thickness and outer side or external plaster is 20 mm thickness minimum.