Parameter (%) | N.E | N.W | N.C | S.W | p-Value | BSEN 196-2 [18] |
SiO2 | 19.0 ± 0.25a | 22.10 ± 0.76b | 19.50 ± 0.07b | 21.90 ± 0.58c | 0.00 | 18.0 - 24.0 |
Al2O3 | 5.18 ± 0.18a | 5.85 ± 0.01b | 5.01 ± 0.03a | 6.25 ± 0.14c | 0.00 | 2.6 - 8.0 |
Fe2O3 | 2.50 ± 0.17a | 5.00 ± 0.08b | 3.23 ± 0.40c | 4.85 ± 0.05b | 0.00 | 1.5 - 7.0 |
CaO | 58.60 ± 0.40a | 64.25 ± 0.23b | 60.50 ± 0.67c | 61.58 ± 0.64b | 0.00 | 61.0 - 69.0 |
MgO | 1.20 ± 0.10a | 3.50 ± 0.06b | 1.80 ± 0.14c | 3.52 ± 0.05b | 0.00 | 0.5 - 4.0 |
SO3 | 2.01 ± 0.15a | 3.50 ± 0.08b | 1.57 ± 0.21a | 2.85 ± 0.09c | 0.00 | 0.2 - 4.0 |
IR | 1.70 ± 0.02a | 2.20 ± 0.04b | 1.50 ± 0.16a | 1.80 ± 0.16a | 0.00 | ≤1.5 |
LOI | 8.10 ± 0.03a | 7.82 ± 0.10a | 8.72 ± 0.06b | 8.50 ± 0.24ac | 0.003 | ≤4.0 |
MC | 0.25 ± 0.08a | 0.50 ± 0.09b | 0.20 ± 0.03a | 0.35 ± 0.08ac | 0.006 | - |
Free Lime | 1.04 ± 0.05a | 1.20 ± 0.12b | 0.88 ± 0.04c | 0.98 ± 0.04ac | 0.002 | ≤2.0 |