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

Table 3

Unconfined compressive strength of untreated and treated soil under different curing periods.

Curing time (d)	Unconfined compressive
	strength (kPa)
	Natural soil	0.3% 1831 + 3%
		KCl improved soil
0	Damage	Damage
7	—	32.92
14	—	47.73
28	—	50.28