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Table 2 Chemical composition of coarse aggregates.

From: Effect of Elevated Temperature on Mechanical Properties of Limestone, Quartzite and Granite Concrete

Element

Limestone

Quartzite

Granite

SiO2

2.69

91.14

63.05

Fe2O3

0.57

2.23

5.85

Al2O3

0.16

3.38

11.26

CaO

53.36

Traces

13.19

MgO

0.21

Traces

4.17

Na2O

0.32

2.71

0.69

K2O

0.41

0.3

1.08

Loss on ignition

42.2

0.1

0.6