The test procedure outlined in ASTM D4546-21 involves the following steps:
The standard outlines two methods for determining the solid content: astm d454621 pdf
The 2021 edition replaced the previous ASTM D4546-14 standard. While it maintains the core procedures, it includes minor technical edits and updated references to ensure consistency with modern geotechnical practices. Three Methods of Testing The test procedure outlined in ASTM D4546-21 involves
is the latest active version of the standard test method for "One-Dimensional Swell or Collapse of Soils." The title explicitly covers both swell (expansion) and collapse (contraction), but it is most famously cited for collapse potential testing. astm d454621 pdf