Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl

Table 2

Free swell rate of improved soil.

Modifier types and dosage		Free swell ratio (%)
OTAC (%)	KCl (%)
—	6	47
1.5	—	36
1.0	—	41
0.5	1	40
0.5	2	33
0.5	4	31
0.5	6	30
0.5	8	27
0.3	2	34
0.3	3	31
0.3	6	25