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. 2021 Jun 11;14(12):3239. doi: 10.3390/ma14123239

Table 3.

Chemical compositions of ground granulated blast-furnace slag, GGBFS, coal siliceous fly ash, CFA, and Portland cement, CEM I 42.5 R, determined according to EN 196-2 (%).

Constituent SiO2 Al2O3 Fe2O3 CaO MgO SO3 Na2O K2O LOI IR 1 Cl−
CEM I 42.5 R 20.51 4.30 3.01 60.38 3.61 3.14 0.16 0.81 2.78 1.44 0.05
GGBFS 35.96 10.61 0.40 42.89 7.10 2.02 0.30 0.46 0.00 – –
CFA 53.79 19.54 10.20 4.44 1.83 0.84 2.03 1.83 1.73 17.41 –

1 Insoluble residue measured by Na2CO3 method (EN 196-2) [30].