Importance of Compaction:

A considerable amount of air is entrapped in concrete along with the partial segregation of aggregates during the manufacture of concrete. It lowers the quality of concrete by making it porous and non-homogeneous. The importance of compacting operations is to remove the entrapped air and arrange the ingredients uniformly to obtain better quality of concrete. The strength of concrete may reduce by 30% by the presence of only 5% voids. The density, durability and strength of concrete are the factors, which affect the quality of compaction.