How to Calculate Quantities of Cement, Sand and
With constant research and development in the field of cement technology and its manufacturing process,a M20 mix of 1::3(by volume) would be too rich,over engineered and uneconomical (~ bags of cement per cum) and will ultimately result into a M30 concrete and above, the reason being latest generation of 53 grade OPC cement is ultimately giving a strength of 65 to 70 MPa at 28days.