 The size of the average particle on each sieve is then analysed to get a cut-off point or specific size range, which is then captured on a screen.The results of this test are used to describe the properties of the aggregate and to see if it is appropriate for various civil engineering purposes such as selecting the appropriate aggregate for concrete mixes and asphalt mixes as well as sizing of water production well screens.The results of this test are provided in graphical form to identify the type of gradation of the aggregate.