Test Method Title
Standard Practice for Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants
Reference Number
ASTM D421
Material
Soil
Test Property
Sample preparation
Description of Test
This practice covers the dry preparation of soil samples as received from the field for particle-size analysis and the determination of the soil constants. This practice can be used to prepare samples for particle-size and plasticity tests where it is desired to determine test values on air-dried samples, or where it is known that air drying does not have an effect on test results relative to samples prepared in accordance with Practice D2217 (which ASTM has discontinued).
Number of Test Specimens
1
Test Specimen Size
Material passing #10 sieve of 115 grams for sandy soil and 65 grams for silt and clay soil
Keywords
Dry preparation, particle size analysis, soil