Sand is a vital ingredient of concrete as a fine aggregate. Although the sand is an inert material in the concrete mix, its role cannot be neglected. Followings are the important functions of sand in the concrete mix. 

  1. Offers requisite surface area for the film of binding material to adhere and spread.
  2. Increases the volume of mortar & consequently makes mortar more economical.
  3. Well-graded sand adds to the density of mortars and concrete.
  4. Prevents excessive shrinkage of mortar.
  5. Since it is an inert material, it renders structure more resistant against atmospheric agencies.

 

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