1 Introduction
2 Experimental Design
2.1 Materials
Chemical composition (%) | ||||||||
---|---|---|---|---|---|---|---|---|
LOI | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | K2O | |
OPC | 3.2 | 20.7 | 5.2 | 3.4 | 61.6 | 2.1 | 2.6 | 0.9 |
Product name | Ingredients | Size (nm) | Specific surface area (m2/g) | Specific gravity | |
---|---|---|---|---|---|
OPC | CaO, SiO2, Al2O3, Fe2O3, etc. | 20,000 | 0.38 | 3.10 | |
Silica fume | SiO2 | 99.6 | 100–150 | 18–20 | 2.22 |
Micro-silica | 96.08 | 22.65 | 20.8 | 2.11 | |
Nano-silica | 99.78 | 14.05 | 203.8 | 1.40 | |
Fumed silica | 99.75 | 13.60 | 144.0 | 1.51 |
Specimens | W/B | Binder volume (%) | ||||
---|---|---|---|---|---|---|
Cement | Silica fume | Micro-silica | Nano-silica | Fumed silica | ||
OPC | 0.30 | 100 | – | – | – | – |
SF-1 | 99 | 1 | – | – | – | |
SF-3 | 97 | 3 | – | – | – | |
MS-1 | 99 | – | 1 | – | – | |
MS-3 | 97 | – | 3 | – | – | |
NS-1 | 99 | – | – | 1 | – | |
NS-3 | 97 | – | – | 3 | – | |
FS-1 | 99 | – | – | – | 1 | |
FS-3 | 97 | – | – | – | 3 |
2.2 Nanomaterial Reactivity Analysis (K-value)
2.3 Mix Design
Specimens | W/B | Binder volume (%) | |||
---|---|---|---|---|---|
Cement | Silica fume | Micro-silica | Nano-silica | ||
OPC | 0.30 | 100 | – | – | – |
SF | 92.5 | 7.5 | – | – | |
MS | 92.5 | – | 7.5 | – | |
NS | 99.0 | – | – | 1 | |
SFNS | 91.5 | 7.5 | 1 | ||
MSNS | 91.5 | – | 7.5 | 1 |