Mechanism on Activation of Coal Gangue Admixture

Table 2

Main chemical composition (by mass/%) of cementitious materials.

Material	Al2O3	SiO2	Fe2O3	CaO	MgO	TiO2	K2O	Na2O
Coal gangue	16.0	45.9	4.71	0.74	1.37	0.78	3.36	0.99
Slag	16.32	36.10	—	35.58	11.32	0.88	0.48	0.54
Fly ash	29.09	53.36	4.63	1.50	1.50	0.75	1.67	0.86