Validating the Use of Slag Binder with 91 Percent Blast Furnace Slag for Mine Backfilling

Table 1

Chemical and physical properties of PCI and GGBFS.

Chemical composition	PCI (%)	GGBFS (%)	Physical properties	PCI	GGBFS
CaO	62.82	37.95	Specific gravity	3.1	2.9
Fe2O3	2.7	0.63	Specific surface area (m^2/kg)	430	460
SiO2	18.03	38.34	Fines content (<45 μm) (%)	88	95
Al2O3	4.53	12.3	Basicity coefficient, Mo	—	0.90
MgO	2.65	7.82	Quality coefficient, K	—	1.50
MnO	0.41	0.48	D10 (μm)	2.85	4.48
K2O	0.73	0.52	D50 (μm)	17.04	12.13
SO3	3.82	0.2	D90 (μm)	43.67	61.68

Note: Mo = (CaO + MgO)/(Al₂O₃ + SiO₂); K = (CaO + MgO + Al₂O₃)/(SiO₂+MnO + Ti₂O).