From: Effect of Adding Scoria as Cement Replacement on Durability-Related Properties
Chemical composition (by mass, %) | Materials | ||||
---|---|---|---|---|---|
Scoriaa | Clinker | Gypsum | Dolomite aggregate | Natural sand | |
SiO2 | 46.52 | 21.30 | 0.90 | 0.42 | 93.39 |
Al2O3 | 13.00 | 4.84 | 0.07 | 0.38 | 0.57 |
Fe2O3 | 11.40 | 3.99 | 0.10 | 0.10 | 0.24 |
CaO | 10.10 | 65.05 | 32.23 | 31.40 | 1.70 |
CaOf | – | 2.1 | – | – | – |
MgO | 9.11 | 1.81 | 0.20 | 20.46 | 0.20 |
SO3 | 0.27 | 0.25 | 45.29 | 0.18 | 1.15 |
Loss on ignition | 2.58 | – | 21.15 | 46.48 | 2.52 |
Na2O | 2.14 | 0.60 | – | 0.06 | 0.06 |
K2O | 0.77 | 0.28 | – | 0.30 | 0.05 |
Cl− | <0.1 | 0.05 | – | 0.021 | 0.017 |
Pozzolan activity index [ASTM C 618] | 79 (at 7 days) 85 (at 28 days) |