A soil sample is loaded to a target stress. Upon saturation, the load is adjusted to prevent any change in the initial void ratio or volume (i.e., holding the height constant).
The magnitude of one-dimensional, wetting-induced swell (heave) in unsaturated soils.
The standard outlines three main laboratory testing methods, usually conducted in a consolidation apparatus (oedometer). Method A (Free Swell or Hydrocompression) Astm D4546-21 Pdf
Yields a comprehensive look at how the wetted soil responds to increasing structural weights. Method C: Multiple-Specimen Swell Pressure
To perform these tests, it is essential to have the official, up-to-date document. You can find the through several authorized channels: A soil sample is loaded to a target stress
is the current standard, titled "Standard Test Methods for One-Dimensional Swell or Collapse Potential of Soils" . Developed by ASTM International , this standard covers the procedures for evaluating:
The standard typically outlines three distinct methods (Methods A, B, and C) to simulate different field conditions: The standard outlines three main laboratory testing methods,
This test determines the compressive properties of the soil after it has already undergone swelling or collapse due to wetting. It is important for determining if the soil has become more or less compressible after saturation. Detailed Test Procedure (General)
The most direct path to a PDF is through the (www.astm.org), which sells the standard directly as the official source. However, ASTM also partners with a network of authorized resellers, many of which offer the same PDF at competitive prices. These include: