Astm D422 New! Jun 2026

| Feature | ASTM D422 (Withdrawn) | ASTM D6913 (Sieves) + D7928 (Hydrometer) | |--------|----------------------|-------------------------------------------| | | Fixed schedule, manual | D7928 allows automated or flexible schedule | | Corrections | Temperature, meniscus | + dispersant, blank run, particle density | | Data reduction | Manual plotting | Spreadsheet templates / software ready | | Fine material handling | One dispersant | Multiple dispersants + ultrasonic option | | Status | Obsolete | Active, maintained |

The ASTM D422 standard test method is a widely used and well-established method for particle-size analysis of soils. While it has some limitations, it provides valuable information about the physical properties of soils. With some improvements in the test procedure and accuracy, the method could be rated 5/5. However, based on its current form, it is rated 4.5/5. astm d422

Based on Stokes' Law , which states that larger particles settle through a liquid faster than smaller ones. | Feature | ASTM D422 (Withdrawn) | ASTM

The test procedure outlined in ASTM D422 involves the following steps: However, based on its current form, it is rated 4

ASTM D422 is the bread and butter of soil mechanics. It is the first number we look at when deciding if a site is suitable for construction. While new standards have superseded the official ASTM designation, the principles of sieving and sedimentation remain the foundation of geotechnical laboratory testing.

The ASTM D422 standard test method covers the determination of the particle-size distribution of soils, including gravel, sand, silt, and clay. The test method involves a series of sieving and sedimentation procedures to separate the soil particles into different size fractions. The results of this test are used to classify soils, estimate their engineering properties, and predict their behavior under various environmental conditions.