ASTM D4221 – Standard Test Method for Dispersive Characteristics of Clay Soil by Double Hydrometer
This test method provides an indication of the natural dispersive characteristics of clay soils by comparing the amount of particles finer than 2-μm as determined by this method compared to the amount of particles finer than 2-μm as determined by Test Method D7928.
clays; deflocculation; dispersion; dispersive clay; erosion; gradation; hydrometer analysis; jugging; particle size; piping; sedimentation analysis
ASTM D4221 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM D4221 standard.
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