Table 3.

Oxide composition on a dry basis of the sodium-based (Na-GP) and potassium-based (K-GP) geopolymers tested in this work.

Oxide Component	Na-GP (wt.%)	K-GP (wt.%)
SiO2	54.83	50.05
Al2O3	23.26	21.23
Fe2O3	1.07	0.98
TiO2	0.89	0.82
Na2O	18.68	0.27
K2O	0.30	25.77
CaO + MgO	0.36	0.33
LOI	0.60	0.54
Total	100.00	100.00
Na (%wt.)	13.86	0.20
K (%wt.)	0.25	21.40