Application of Ground Granulate Blast Furnace Slag-Steel Slag Composite Binder in a Massive Concrete Structure under Severe Sulphate Attack

Table 1

Chemical compositions of the cement, GGBS, and steel slag (%).

Sample	SiO2	Al2O3	Fe2O3	CaO	MgO	MnO	Loss
Cement	22.36	7.73	3.66	57.21	3.10	—	2.31
GGBS	26.65	14.25	0.62	46.83	7.61	0.27	1.86
Steel slag	19.11	7.46	18.01	43.37	5.17	2.66	1.36