Strength and Expansion and Deformation Characteristics of Modified Expansive Soil by Octadecylamine

Table 3

Free swelling rate of modified expansive soil with different octadecylamine contents.

Octadecylamine content (%)	First free expansion rate (%)	Second free expansion rate (%)	Average value (%)
0.0	51	53	52
0.2	50	48	49
0.3	46	44	45
0.5	43	39	41
0.8	32	28	30