1. ASTM D3080-11 (2011) Standard test methods for direct shear test of soils under consolidated drained conditions. American Society for Testing and Materials, West Conshohocken
2. ASTM D422-63 (2007) Standard test method for particle-size analysis of soils. American Society for Testing and Materials, West Conshohocken
3. ASTM D4318-10 (2010) Standard test methods for liquid limit, plastic limit, and plasticity index of soils. American Society for Testing and Materials, West Conshohocken
4. ASTM D698-12 (2012) Standard test methods for laboratory compaction characteristics of soil using standard effort. American Society for Testing and Materials, West Conshohocken
5. ASTM D854-10 (2010) Standard test methods for specific gravity of soil solids by water pycnometer. American Society for Testing and Materials, West Conshohocken