1. ASTM D427-04: Test Method for Shrinkage Factors of Soils by the Mercury Method, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA (2004).
2. ASTM D2487-11 Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System). ASTM International, West Conshohocken, PA (2011).
3. ASTM D854-14.: Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA (2014).
4. ASTM D4318-17: Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA (2017).
5. ASTM D7928-17: Standard Test Method for Particle-Size Distribution (Gradation) of Fine-Grained Soils Using the Sedimentation (Hydrometer) Analysis, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA (2017).