Grading of aggregate

1. Particle size distrivution of aggregate is called grading
2. Expressed in terms of % by weight retained on a series of sieves
3. 80mm,40mm , 20mm , 10mm and 4.75mm sieves are used for grading of coarse aggregate
4. 10mm , 4.75 mm , 2.36 mm , 1.18mm , 600-UM , 300UM , 150um are used for fine aggregates