Grading of sand

      According to the state of  grains, sand is classified as fine, coarse and gravelly 

     Sand passing through a screen with clear opening of 1.5875mm  is known as fine sand. It  is generally used for masonry works. 

     Sand passing through a screen with clear openings of 7.62mm  is  known as gravely sand. It is generally  used for plastering. 

     Sand passing through a screen with clear opening of 3.175mm  is  known as coarse sand. It is generally  used for masonary  work