Investigation on Dynamic Stability of Cement-Stabilized Expansive Soil Subgrades Subjected to Repeated Heavy-Haul Train Loads

Table 2

Comparison of some indexes of expansion soils improved with cement and lime.

Category	Natural soil sample	Ratio (3%)		Ratio (4%)		Ratio (5%)
		Cement	Lime	Cement	Lime	Cement	Lime
Free swelling ratio (%)	66	32	27	28	24	23	21
Swelling ratio with loading (25 kPa)	6.8	0.1	<0	0.06	<0	<0	<0
Swelling ratio with loading (50 kPa)	6.7	<0	<0	<0	<0	<0	<0
Expansion force (kPa)	129	14	12	10	5	1	1
Unconfined compressive strength test (7 days) (kPa)	44	866	308	1,018	477	117	786