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2. ASTM D3080M-11 (2011) Standard test method for direct shear test of soils under consolidated drained conditions. 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 maximum index density and unit weight of soils using a vibratory table. ASTM International, West Conshohocken
5. ASTM D6913 (2017) Standard test methods for particle-size distribution (gradation) of soils using sieve analysis. American Society for Testing and Materials, West Conshohocken