Table 10 Elemental composition (weight%) from the EDX results.

From: Microstructural evolution and mechanical property enhancement of red mud incorporated high strength concrete

Curing age

Mixes

O

Ca

Si

Al

Fe

Ca/Si

(Al + Fe)/Ca

Total

7 Days

B0RM

61.45

18.66

17.32

2.02

0.55

1.0774

0.137728

100

B5RM

62.02

17.87

17.04

2.19

0.88

1.0487

0.171796

100

B10RM

60.91

17.53

17.88

2.76

0.92

0.9804

0.209926

100

B15RM

59.58

18.57

18.35

2.66

0.84

1.012

0.188476

100

B20RM

59.58

18.98

17.93

2.83

0.68

1.0586

0.184932

100

28 Days

B0RM

61.19

17.69

18.26

2

0.86

0.9688

0.161673

100

B5RM

64.26

16.05

16.87

2.1

0.72

0.9514

0.175701

100

B10RM

59.99

17.87

18.95

2.3

0.89

0.943

0.178511

100

B15RM

61.45

17.19

17.85

2.85

0.66

0.963

0.204188

100

B20RM

61

17.45

17.89

2.97

0.69

0.9754

0.209742

100

90 Days

B0RM

63.69

16.54

16.67

2.65

0.45

0.9922

0.187424

100

B5RM

60.84

17.62

18.25

2.42

0.87

0.9655

0.18672

100

B10RM

60

17.85

18.49

3.09

0.57

0.9654

0.205042

100

B15RM

60.13

17.87

18.37

2.97

0.66

0.9728

0.203134

100

B20RM

60.73

17.98

18.1

2.56

0.63

0.9934

0.177419

100

180 Days

B0RM

64.39

16.28

16.23

2.51

0.59

1.0031

0.190418

100

B5RM

61.87

17.38

17.92

2.21

0.62

0.9699

0.162831

100

B10RM

60.46

17.87

18.86

2.06

0.75

0.9475

0.157247

100

B15RM

63.12

16.56

16.92

2.9

0.5

0.9787

0.205314

100

B20RM

64.82

16.02

15.89

2.54

0.73

1.0082

0.20412

100