• It assists in producing workability and uniformly in mixture.
• It assists the cement paste to hard the coarse aggregate particles.
• It helps to prevent possible segregation of paste and coarse aggregate particularly during the transport operation of concrete for a long distance.
• It reduces the shrinkage of binding material.
• It prevents the development of a crack in the concrete.
• It fills the voids existing in the coarse aggregate. Thus, it helps in increasing the density of concrete.
• It assists in hardening of cement by allowing the penetration of water through its voids. 

Functions Of Coarse Aggregate

• It makes a solid & hard mass of concrete with cement and sand.
• It provides bulk to the concrete.
• It increases the crushing strength of concrete.
• It reduces the cost of concrete by using cheaper material.

Read Also:

•  Requirements or Characteristics Of A Good Fine & Coarse Aggregates
•  Bulking Of Sand
•  Different Grading Zone Value of Fine Aggregates(sand) As Per IS: 383