Grade of Concrete and Slump of concrete???

Question

Accepted Answer

Grade of concrete refers to its strength and slump of concrete refers to its consistency.

Grade of concrete is determined by its compressive strength, such as M20, M25, etc.
Slump of concrete is a measure of its workability and is determined by the flow of concrete when placed in a slump cone.
Higher grade of concrete indicates higher strength and lower slump indicates less workable concrete.
For example, M30 grade concrete has a higher strength than M20 grade concrete, and a slump of 50 mm indicates a less workable concrete compared to a slump of 100 mm.

Accepted Answer

The site slamp normally 80-120mm