Sodium Silicate Gel Effect on Cemented Tailing Backfill That Contains Lead-Zinc Smelting Slag at Early Ages

Table 2

Main chemical compositions of the cement used.

Element unit	SO3 (wt.%)	Fe2O3 (wt.%)	Al2O3 (wt.%)	SiO2 (wt.%)	CaO (wt.%)	MgO (wt.%)	Relative density
PCI	3.82	2.70	4.53	18.03	62.82	2.65	3.1