ASTM D4221-18
- Standard Test Method for Dispersive Characteristics of Clay Soil by Double Hydrometer
- standard by ASTM International, 01/01/2018
- Category: ASTM
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1.1 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 (1).2 In order to do this comparison, two similar specimens must be obtained from the sample.
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