Skip to main content
International Journal of Concrete Structures and Materials

Table 2 Alkali activation mixtures based on the IR spectroscopic determination of the clay activation index

From: Alkali Activation of Common Clay Deposits: Evaluation of the Suitability by an IR Spectroscopic Method

Calcined clay sample

Clay activation index in %

NaOH in mol

Na2SiO3 in mol

Clay A

88.6

1.77

1.77

Clay B

42.4

0.85

0.85

Clay C

25.1

0.5

0.5

Clay D

14.2

0.28

0.28

Clay E

95.3

1.9

1.9

Clay F

64.4

1.29

1.29

Clay G

20.2

0.4

0.4

Clay H

4.3

0.09

0.09

Ref. pure metakaolin

100

2

2

  1. All mixtures consisted of 450 g calcined clay, 1350 g CEN-sand and the calculated activator amount
Back to article page