Table 3 Chemical composition of raw materials by XRF.

From: Hydration properties of belite cement prepared by lime-hydrothermal treatment of Saudi basaltic volcanic ash and glass

Oxide, wt%

Raw materials

Lime

Volcanic ash

OPC

SiO2

1.92

60.92

22.13

Al2O3

0.65

14.73

4.13

Fe2O3

0.34

7.12

1.88

CaO

93.23

5.08

64.10

MgO

0.69

1.92

3.15

Na2O

0.20

4.23

0.13

K2O

0.04

2.41

0.62

P2O5

0.05

0.31

0.22

TiO2

0.05

0.80

0.06

SO3

0.48

0.17

2.16

Cl−

0.05

0.04

0.06

LOI*

1.55

2.12

1.16

Total

99.25

99.85

99.80

  1. *LOI loss on ignition.
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