Development of Some Novel Suction-Based Correlations for Swell Behavior of Expansive Soils

Table 2

Classification of the investigated soil concerning USCS and Chen criteria [29].

Designation	PI (%)	USCSclassification	Expansivity	Chen criteria
S1	37	CH	High	PI = 10–15
Low
S2	34	CH	High
S3	34	CH	High	PI = 15–28
Medium
S4	23	CL	Medium
S5	22	CL	Medium	PI = 28–41
High
S6	27	CL	Medium
S7	25	CL	Medium	>41
Very high
S8	30.5	CH	High