Table 2.
Samples used for each technique and exposure media.
| Technique | Exposure Medium | Type of Sample | Exposure Time | Samples Tested | Standard |
|---|---|---|---|---|---|
| Impedance spectroscopy | 15 wt % Na2SO4 | Disks 10 cm diameter and 2 cm thickness | Up to 120 days | 5 | n/a |
| Distilled water | Disks 10 cm diameter and 1 cm thickness | Up to 90 days | 5 | n/a | |
| Electrical resistivity | 15 wt % Na2SO4 | Cylinders 30 cm height and 7.5 cm diameter | Up to 120 days | 4 | UNE 83988-2 |
| Distilled water | Cylinders 30 cm height and 15 cm diameter | Up to 90 days | 4 | UNE 83988-2 | |
| Mercury intrusion porosimetry | 15 wt % Na2SO4 | Pieces of disks 10 cm diameter and 2 cm thickness | 28, 60, 90 and 120 days | 2 | n/a |
| Distilled water | Pieces of disks 10 cm diameter and 1 cm thickness | 2, 28 and 90 days | 2 | n/a | |
| Compressive strength | 15 wt % Na2SO4 | Prisms 4 cm × 4 cm × 16 cm | 28 days | 3 | UNE-EN 196-1 |
| Distilled water | Prisms 4 cm × 4 cm × 16 cm | 28 days | 3 | UNE-EN 196-1 |