1. ASTM D4318 (2010) Standard test methods for liquid limit, plastic limit, and plasticity index of soils. D4318–10
2. ASTM D1557 (2007)Standard test methods for laboratory compaction characteristics of soil using standard effort (12 400 Ft-lbf/ft3 (600 KN-m/m3)) 1. ASTM international
3. ASTM D2166 (2016) Standard test method for unconfined compressive strength of cohesive soil. ASTM international
4. ASTM D2850 (2007) Standard test method for unconsolidated-undrained triaxial compression test on cohesive soils. ASTM International
5. ASTM D854 (2006) Standard test methods for specific gravity of soil solids by water pycnometer. ASTM international