1. ASTM D4253–16 (2016) Standard test methods for maximum index density and unit weight of soils using a vibratory table. ASTM International, West Conshohocken, PA. www.astm.org
2. ASTM D4254–16 (2016) Standard test methods for minimum index density and unit weight of soils and calculation of relative density. ASTM International, West Conshohocken, PA. www.astm.org
3. ASTM D6836–16 (2016) Standard Test Methods for Determination of the Soil Water Characteristic Curve for Desorption Using Hanging Column, Pressure Extractor, Chilled Mirror Hygrometer, or Centrifuge, ASTM International, West Conshohocken, PA. www.astm.org
4. ASTM D6913/D6913M-17 (2017) standard test methods for particle-size distribution (gradation) of soils using sieve analysis. ASTM International, West Conshohocken, PA. www.astm.org
5. ASTM D7928–17 (2017) Standard test method for particle-size distribution (gradation) of fine-grained soils using the sedimentation (hydrometer) analysis. ASTM International, West Conshohocken, PA. www.astm.org