Table 15 Influence of enzyme on UCS of montmorillonitic soils (B.C. soils) as reported in literature.

From: Plasticity properties and undrained strength of bio-enzyme treated black-cotton soils

Unconfined compression strength (kPa)

Source

Untreated

Enzyme treated

Improvement Factor (IF)

267.0

859.0

3.22

25

147.0

1533

10.43

7

3.53

8.86

2.51

26

3.57

8.72

2.44

27

3.53

8.86

2.51

28

2.28

5.67

2.49

20

2.68

6.53

2.44

20

52.9

125.7

2.38

23

127.48

154.04

1.21

29

127.52

210.32

1.65

41

210.0

320.0

1.52

39

-

-

1.28#

42

#Information of increase in UCS of 28% is available from the source, based on which IF is approximated

151.14

787.0

5.20

40

90.0

135.0

1.50

24