ASTM D4546-21 is the active standard designated by ASTM International for evaluating the magnitude of one-dimensional heave or collapse of soils. This test method simulates vertical stress and wetting conditions that a soil stratum experiences beneath a foundation or structure.
This method measures the swell or collapse at a predetermined overburden pressure, followed by load-induced compression. It is often used to simulate the actual loading conditions in the field. Test Method C: Variable Load Swell/Collapse
: ASTM International (Committee D18 on Soil and Rock)
The search term represents a specific need for the most current, authoritative method for evaluating soil collapse and swell. Building on collapsible soil without this testing is a recipe for catastrophic foundation settlement—cracked slabs, broken pipes, and structural failure.
The 2021 version of this standard covers two main laboratory test methods for measuring one-dimensional wetting-induced deformation.
