Table 1.

Chemical composition (weight%) of weathered fly ash used in this paper after thermal treatment at 950 °C, metakaolin and the sodium silicate solution.

Fly Ash
Al2O3	SiO2	K2O	Fe2O3	Na2O	MgO	CaO	others
28.12	53.75	1.89	6.99	0.87	1.59	4.32	2.47
Metakaolin
Al2O3	SiO2	K2O	Fe2O3	TiO2	MgO	CaO	others
41.90	52.90	0.77	1.60	1.80	0.19	0.17	0.67
Sodium Silicate Solution
SiO2	Na2O	H2O
27.40	8.15	64.45