Table 4 Test results for different proportions of cement and FGD gypsum in the soil.

From: Performance optimization of black cotton soil stabilized with FGD gypsum and cement via response surface methodology

C

FGD

LL (%)

PL (%)

PI (%)

SL (%)

MDD (g/cc)

OMC (%)

k (cm/s)

UCS

CBR S

CBR US

5.00

2.00

41.4

28.2

13.2

7.4

1.98

16.14

1.33E-07

585

33.9

46.5

5.00

3.41

41.4

28.2

13.2

7.4

1.98

16.14

1.33E-07

585

33.9

46.5

2.00

1.00

39.2

28.3

10.9

7.1

1.92

19.06

3.11E-07

560

32.1

43

5.00

2.00

41.4

28.2

13.2

7.4

1.98

16.14

1.33E-07

585

33.9

46.5

0.76

2.00

52.3

28.9

23.3

8.9

1.91

17.56

2.05E-06

550

18.9

27.8

9.24

2.00

46.7

29.7

17

8.2

1.78

19.09

2.75E-07

528

31.5

40.5

5.00

0.59

52.1

30.4

21.62

8.2

1.84

18.8

2.21E-06

520

16.8

26

5.00

2.00

41.4

28.2

13.2

7.4

1.98

16.14

1.33E-07

585

33.9

46.5

8.00

1.00

41.4

28.2

13.2

7.4

1.98

16.14

1.33E-07

585

33.9

46.5

5.00

2.00

56.5

32.4

24.12

9.5

1.72

20.51

2.41E-06

488

16.1

21.1

2.00

3.00

31.2

19.2

12

7.6

1.85

18.49

1.98E-05

566

24.8

36.5

8.00

3.00

29.2

17.4

11.8

7

1.81

18.89

2.82E-05

538

24.1

35

5.00

2.00

33.2

19.7

13.5

8

1.75

19.69

2.21E-05

500

23.3

34.4