1. ASTM D854 (2006) Standard test methods for specific gravity of soil solids by water pycnometer. ASTM D854, ASTM International, West Conshohocken, PA, USA
2. ASTM D3080M-11 (2011) Standard test method for direct shear test of soils under consolidated drained conditions. ASTM D3080M-11, ASTM International, West Conshohocken, PA, USA
3. ASTM D4253-16 (2016) Standard test methods for maximum index density and unit weight of soils using a vibratory table. ASTM D4253-16, ASTM International, West Conshohocken, PA, USA
4. ASTM D4254-16 (2016) Standard test methods for minimum index density and unit weight of soils using a vibratory table. ASTM D4254-16, ASTM International, West Conshohocken, PA, USA
5. ASTM D6913 (2017) Standard test methods for particle-size distribution (gradation) of soils using sieve analysis. ASTM D6913, ASTM International, West Conshohocken, PA, USA