ASTM D422-63(2007)e2 pdf free.Standard Test Method for Particle-Size Analysis of Soils. ASTM D422 covers the quantitative determination of the distribution of particle sizes in soils. The distribution of particle sizes larger than 75 μm (retained on the No. 200 sieve) is determined by sieving, while the distribution of particle sizes smaller than 75 μm is determined by a sedimentation process,...