ASTM D422

ASTM D422 is a standardized test method used to determine the particle size distribution of coarse and fine aggregate in a sample. Essentially, it measures how much material of different sizes is present, helping verify that aggregates meet specific size requirements for construction projects. The process involves passing the sample through a series of sieves with different opening sizes and weighing the amounts retained on each. This information ensures consistent quality and appropriate grading of aggregate materials for use in concrete, asphalt, and other building materials.