Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer

Table 1

Main physical and chemical properties of tailings, OPC, and slag.

Chemical composition (wt.%)	Tailings	OPC	Slag	Physical properties	Tailings	OPC	Slag
CaO	2.98	62.34	40.01	Specific gravity	2.68	3.3	2.90
Fe2O3	1.72	5.06	0.38	Specific surface (cm^2/g)	3470	5808	6198
SiO2	62.5	21.43	33.80	−20 μm content (%)	42.9	66.3	70.1
Al2O3	16.2	4.25	15.71	Cu	25.75	3.29	3.38
MgO	0.52	2.61	6.90	Cc	0.50	1.25	1.10
Na2O	3.07	0.41	0.05	Pozzolanic strength index (%)
K2O	8.11	0.73	0.44	7 days	N/A	N/A	69.6
SO3	0.45	1.48	0.18	28 days	N/A	N/A	90.4