Table 2 Chemical composition of expanded perlite [%].

From: Influence of very high temperatures on properties of medium grained lightweight aggregate mortars containing perlite and various cement types

SiO2

Al2O3

K2O

Na2O

MgO

CaO

Fe2O3

74.5

13.9

4.2

4.4

0.6

1.0

1.1

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