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Table 1 Surface area (SABET), real density (RD), porosity, CEC, and percentages of carbon (C), hydrogen (H), and nitrogen (N) for natural and modified bentonite clays and comparison of the properties natural and modified nontronite with some bentonite samples.

From: Use of Bentonite and Organobentonite as Alternatives of Partial Substitution of Cement in Concrete Manufacturing

Sample

SABET (m2 g−1)

RD (g cm−3)

Porosity (%)

CECa (mmol/100 g)

CECb (mmol/100 g)

C (%)

H (%)

N (%)

C/N (calculated)

C/N (found)

References

BBT

34.2

0.992

29.325

98.8

109.4

0.016

0.093

Current research

BBTAPS

597.4

2.734

68.473

108.4

124.5

4.412

7.895

0.635

6.948

9

Current research

BBTAEAPS

612.1

2.823

72.153

135.1

155.5

1.758

6.792

0.439

4.005

4

Current research

Imp-B

31.5

88.7

 

Sun et al. (2007)

PRYL-B

71.1

98.4

Sun et al. (2007)

Ca-bentonite

20

60.68

Ding et al. (2009)

Na-bentonite

56

94.30

Ding et al. (2009)

  1. a298 ± 1 K.
  2. b373 ± 1 K.