When performing these tests, lab technicians typically report several critical metrics used in foundation design:
: This procedure uses "undisturbed" or intact samples taken directly from natural deposits or existing fill. It measures how a specific point in the soil profile will react to wetting while under its in-situ vertical stress. astm d454621 pdf
: This method uses soil that has been remolded or compacted in the lab. It is primarily used to simulate the behavior of compacted fills . It is also the standard way to determine Swell Pressure (the force required to prevent swelling) and Free Swell (the percentage of expansion under minimal load). When performing these tests