1. ASTM D 2487-11. (2011). “Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System).”
2. ASTM D 422-63. (2007). “Standard Test Method for Particle-Size Analysis of Soils.”
3. ASTM D 4253-16. (2014). “Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table.”
4. ASTM D 4254-16. (2014). “Standard Test Methods for Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density.”
5. ASTM D 4959-16. (2016). “Standard Test Method for Determination of Water Content of Soil by Direct Heating.”