1. ASTM D2487 (2011). Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System). West Conshohocken PA: ASTM International.
2. ASTM D422 (2007). Standard Test Method for Particle-Size Analysis of Soils. West Conshohocken PA: ASTM International.
3. ASTM D4318 (2010). Standard Test Methods for Liquid Limit Plastic Limit and Plasticity Index of Soils. West Conshohocken PA: ASTM International.
4. ASTM D4546 (2008). Standard Test Methods for One-Dimensional Swell or Collapse of Cohesive Soils. West Conshohocken PA: ASTM International.
5. ASTM D698 (2012). Standard Tests for Laboratory Compaction Characteristics of Soil Using Standard Effort. West Conshohocken PA: ASTM International.