Strength and Microscopic Characteristics of Slag-Based Geopolymer-Solidified Sludge after Dry–Wet Cycling with Chloride Salt Solutions

Table 2

Chemical composition of sludge, blast furnace slag, and calcium carbide slag.

Raw materials	Chemical composition and content (%)
	SiO2	Al2O3	CaO	Fe2O3	MgO	SO3	TiO2
Sludge	70.68	15.36	1.18	4.59	0.95	0.53	1.24
Slag	35.68	17.03	34.89	0.49	6.28	1.63	0.53
Calcium carbide slag	5.69	3.68	67.84	0.56	0.31	0.22	0.32