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. 2022 May 23;15(10):3732. doi: 10.3390/ma15103732

Table 1.

Properties of fly ash and metakaolin.

Parameters Fly Ash Metakaolin
SiO2 (%) 51.80 52.10
Al2O3 (%) 26.40 41.00
Fe2O3 (%) 13.20 4.30
CaO 1.61 0.09
MgO 1.17 1.36
SO3 0.21 -
Na2O 0.31 0.01
K2O 0.68 0.62
P2O5 1.39 -
Loss of ignition (%) 0.50 0.50
Specific gravity 2.60 2.63