The Effect of Calcium Formate, Sodium Sulfate, and Cement Clinker on Engineering Properties of Fly Ash-Based Cemented Tailings Backfill

Table 2

Chemical composition of tailings and fly ash used.

Composition (wt.%)	SiO2	Al2O3	Fe2O3	MgO	CaO	FeO	K2O	TiO2	Na2O	MnO	SO3	Ignition loss
Tailings	79.99	2.54	8.04	2.04	2.78	1.16	—	—	0.31	0.013	—	3.127
Fly ash	43.77	19.05	5.85	4.41	10.84	0.71	2.46	1.38	—	—	—	8.45
Cement	20.34	5.02	3.11	1.09	64.78	—	0.35	0.26	0.10	—	2.20	1.73
Cement clinker	22.56	4.40	3.04	1.82	67.42	—	0.13	—	0.27	—	—	0.36