1. ASTM D2487-11 (2011) Standard practice for classification of soils for engineering purposes (Unified Soil Classification System). ASTM International, West Conshohocken
2. ASTM D3999/D3999M-11e1 (2011) Standard test methods for the determination of the modulus and damping properties of soils using the cyclic triaxial apparatus. ASTM International, West Conshohocken
3. ASTM D4253-16 (2016) Standard test methods for maximum index density and unit weight of soils using a vibratory table. ASTM International, West Conshohocken
4. ASTM D4254-16 (2016) Standard test methods for minimum index density and unit weight of soils and calculation of relative density. ASTM International, West Conshohocken
5. ASTM D6913/D6913M-17 (2017) Standard test methods for particle-size distribution (gradation) of soils using sieve analysis. ASTM International, West Conshohocken