Table 3.
Properties of gel phases in alkali-activated GBFS paste and OPC-based paste.
| Property | Alkali-Activated GBFS, w/GBFS = 0.38 | OPC Paste [70], w/OPC = 0.35 |
|---|---|---|
| Ca/Si | 0.84 | 1.4–1.6 |
| Gel morphology | Foil-like | Fiber or honeycomb-like |
| Gel alkali binding capacity [75] | Moderate | Low |
| SANS specific surface area [71] | High | Low |
| Atomic packing density [71] | High | Low |
| Amorphous phase content at 28 days | 99 wt% | 76.2 wt% |
| Compressive strength at 28 days | 112.7 MPa | 77.6 MPa |
| Compressive strength at 60 days | 113.0 MPa (maximum) | 84.5 MPa (maximum) |