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International Journal of Concrete Structures and Materials

Table 1 Chemical composition of the pozzolans.

From: Pozzolanic Reaction of a Biomass Waste as Mineral Addition to Cement Based Materials: Studies by Nuclear Magnetic Resonance (NMR)

Oxide (%)

SF

EGN before HCl treatment

EGN after HCl treatment

EGC before HCl treatment

EGC after HCl treatement

SiO2

84.5

43.30

80.0

22.4

49.4

Al2O3

0.97

1.05

0.44

0.28

0.47

Fe2O3

2.62

1.13

0.77

0.321

0.83

CaO

2.93

5.47

1.85

3.98

10.10

Na2O

0.15

0.25

0.11

0.07

–

K2O

1.04

21.10

7.05

53.9

8.60

MgO

0.60

6.25

1.11

3.94

4.22

SO3

–

2.01

0.65

2.3

0.47

P2O5

–

2.41

0.56

4.06

9.91

Cl

–

7.40

0.95

8.44

0.46

LOI

7.53

9.01

6.31

n.d.

14.6

  1. SF silica fume, EGC Cameroon elephant grass, n.d. non determined, EGN Napier elephant grass, LOI loss on ignition at 1000 °C.
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