Some useful tips to determine the weight of a concrete cube
The cubes are normally examined at 7 & 28 days. The exception may happen in special case where prior tests are necessary. As for instance, in the case of eliminating a concrete shutter securely before 7 days.
Nor 1 cube will be examined at 7 days and 2 cubes at 28 days. But it may change as per your needs. So, initially, verify the design. The cubes are detached from the curing tank as well as dried and grit removed.
With the help of a calibrated compression machine, the cubes are examined. It is accomplished inwardly by an experienced personnel or by a certified test house.
The cubes are examined on the face at a 90 degree angle to the casting face. The lowest compressive strength of concrete will be stipulated by the client/designer in a particular format.
Concrete Cube Weight
Unit weight (Density) of concrete=2400 Kg/cum
So, mass is required and the formula is Mass=Density X volume
Volume of cube=150mm X 150mm X 150mm
Mass=2400 X (0.15*0.15*0.15) = 8.1
Weight of cube in kg = 8.1
To learn the detail process, watch the following video tutorial
Video Source: L & T - Learning Technology