Improvement of the Early-Age Compressive Strength, Water Permeability, and Sulfuric Acid Resistance of Scoria-Based Mortars/Concrete Using Limestone Filler
Table 1
Chemical composition of the materials used in the study.
Chemical composition (%)
Cementitious materials
OPC (clinker + gypsum)
Volcanic scoria
Limestone filler
SiO2
19.57
44.91
1.57
Al2O3
4.86
16.98
0.69
Fe2O3
3.50
8.64
0.33
CaO
62.21
9.39
54.37
MgO
2.78
8.87
0.43
SO3
2.12
0.01
0.01
Loss on ignition (LOI)
1.36
0.36
42.22
Na2O
0.22
2.76
0.02
K2O
0.34
1.75
0.01
TiO2
0.6
0.9
0.07
Cl−
0.03
—
0.01
Insoluble residue
1.67
5.01
—
Total
99.26
99.58
99.73
Pozzolan activity index (ASTM C618)
78 (at 7 days)
89 (at 28 days)
Main compounds of ordinary Portland cement calculated according to Bogue’s formulas
