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Table 1 Chemical composition of the used materials.

From: Effect of Adding Scoria as Cement Replacement on Durability-Related Properties

Chemical composition (by mass, %)

Materials

  

Scoriaa

Clinker

Gypsum

Dolomite aggregate

Natural sand

SiO2

46.52

21.30

0.90

0.42

93.39

Al2O3

13.00

4.84

0.07

0.38

0.57

Fe2O3

11.40

3.99

0.10

0.10

0.24

CaO

10.10

65.05

32.23

31.40

1.70

CaOf

2.1

MgO

9.11

1.81

0.20

20.46

0.20

SO3

0.27

0.25

45.29

0.18

1.15

Loss on ignition

2.58

21.15

46.48

2.52

Na2O

2.14

0.60

0.06

0.06

K2O

0.77

0.28

0.30

0.05

Cl

<0.1

0.05

0.021

0.017

Pozzolan activity index [ASTM C 618]

79 (at 7 days)

85 (at 28 days)

    
  1. aSiO2(reactive) content in the studied scoria = 42.22 % (determined in accordance with EN 196-2).