At first we will define both terms consolidation andcompaction of soil. Consolidation is a process in which saturated soil is compressed due to steady and static pressure. Compaction is a process in which with the help of mechanical pressing air present in void of soil is expelled resulting closely packed soil structure. Compacted soil has better shear strength and hence better bearing capacity and stability of soil. Both terms are very important infoundation engineering. 

Consolidation and compaction are totally different process. Though both process results a reduction in volume, it is important to know the difference between them. These are: