How to calculate Cement and Water quantity for cement grouting with CBS Factor by Er. C B Singh.

How to calculate the cement and water quantity for cement grout

If the proportion of grout is given, the shortcut calculation has been developed, called the CBS FACTOR; the calculation has been shown below…….

 

Cement Quantity= Grout in Litres/CBSFACTOR (Cement Qty. in                                                                                                                         Bags) Water Quantity = Cement Quantity X proportion of water (Water Qty. in litres)

 

Where,

CBS FACTOR = 65.66 for 1:1 (one cement and one water)

                        = 60.66 for 1:0.9 (one cement and 0.9 water)

                        =55.66 for 1:0.8 (one cement and 0.8 water)

                        =45.66 for 1:0.6 (one cement and 0.6 water)

                        =40.66 for 1:0.5 (one cement and 0.5 water)

                         

From the above formula, we can calculate the quantity of cement bags and water in litres instantly with simple division or multiplication.

 

For example….

For a proportion of grout of 1:0.5 for 1000 litres of grout, the quantity of cement and water has been calculated…

Cement Qty. = 1000/40.66 = 24.59 bags X 50 = 1229.71 kgs

Water Qty. = 1229.71X0.5 = 614.85 Litres

The above calculation can be verified using mathematical techniques.

 

Note- These formulas are for plane grout; no chemicals and additives are added.