1 Introduction
2 Experimental Details
2.1 Raw Materials and Specimen Preparation
Constituent | Metakaolin | Silica fume |
---|---|---|
SiO2 | 50.37 | 97.30 |
Al2O3 | 43.33 | 0.06 |
CaO | 0.45 | 0.09 |
Fe2O3 | 2.82 | 0.19 |
TiO2 | 2.29 | – |
MgO | 0.15 | 0.42 |
SO3 | 0.05 | 0.9 |
Specimen | Silica fume addition (%) | Precursor | Sodium silicate solution | ||||
---|---|---|---|---|---|---|---|
Metakaolin (wt%) | \(SF^{a}\) (wt%) | NaOH (wt%) | \(SF^{b}\) (wt%) | Water (wt%) | \(Mol^{c}\) | ||
S/A 1.0 | 0 | 51 | 0 | 17 | 0 | 32 | 13.2 |
5 | 49 | 2 | 17 | 0 | 32 | 12.7 | |
10 | 47 | 5 | 16 | 0 | 32 | 12.3 | |
15 | 45 | 8 | 15 | 0 | 32 | 11.9 | |
S/A 1.4 | 0 | 43 | 0 | 15 | 10 | 32 | 11.3 |
5 | 42 | 2 | 14 | 10 | 32 | 11.0 | |
10 | 41 | 4 | 14 | 9 | 32 | 10.7 | |
15 | 40 | 6 | 13 | 9 | 32 | 10.3 | |
S/A 1.8 | 0 | 38 | 0 | 13 | 17 | 32 | 10.0 |
5 | 37 | 2 | 13 | 16 | 32 | 9.7 | |
10 | 36 | 4 | 12 | 16 | 32 | 9.4 | |
15 | 35 | 6 | 12 | 15 | 32 | 9.2 | |
S/A 2.0 | 0 | 36 | 0 | 13 | 19 | 32 | 9.4 |
5 | 35 | 2 | 12 | 19 | 32 | 9.2 | |
10 | 34 | 3 | 12 | 19 | 32 | 8.9 | |
15 | 33 | 5 | 12 | 18 | 32 | 8.7 |