1. Abbaslou H, Hadifard H, Ghanizadeh AR (2020) Effect of cations and anions on flocculation of dispersive clayey sois. Heliyon 6 e03462:1-8. https://doi.org/10.1016/j.heliyon.2020.e03462
2. ASTM (1993) ASTM D4647-93 Standard test method for identification and classification of dispersive clay soils by the pinhole test
3. ASTM (1999) ASTM D4221-99 Standard test method for dispersive characteristics of clay soil by double hydrometer
4. ASTM (2000) ASTM D6572-00 Standard test methods for determining dispersive characteristics of clayey soils by the crumb test
5. ASTM (2011) ASTM D2487-11 Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)