Compressive Strength and Microstructure Properties of Alkali-Activated Systems with Blast Furnace Slag, Desulfurization Slag, and Gypsum

Table 1

Chemical compositions.

	CaO (%)	SiO2 (%)	Al2O3 (%)	Fe2O3 (%)	MgO (%)	Na2O (%)	K2O (%)	SO3 (%)	C (%)	Density (g/cm^3)
OPC (O)	62.2	20.7	6.2	3.10	2.8	0.10	0.8	2.1	—	3.15
BFS (B)	43.5	32.8	15.6	0.50	4.41	0.25	0.49	1.04	—	2.98
DS (D)	62.2	10.6	1.21	11.6	1.5	0.10	—	5.2	4.1	3.01
Gypsum (G)	41.6	0.73	0.17	0.16	—	0.02	0.03	55.5	—	2.93