Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Porosity Pc (%), pore volume as a function of radii, as total porosity percentage (%), density (kg/dm3) of the studied plasters
| Symbol | Total porosity (% vol) | Radius of capillaries (μm) | Density (kg/dm3) | |||||
|---|---|---|---|---|---|---|---|---|
| <0.01 | 0.01÷0.1 | 0.1–1.0 | 1.0–10 | 10–100 | >100 | |||
| Percentage of pore volume (%) | ||||||||
| S1 | 41.6 | – | 4.5 | 15.6 | 32.3 | 34.8 | 12.8 | 1.35 |
| S2 | 45.4 | – | 3.7 | 13.4 | 27.9 | 34.5 | 20.5 | 1.31 |
| S3 | 52.1 | – | 3.2 | 11.9 | 28.9 | 38.7 | 17.3 | 1.11 |
| S4 | 58.4 | – | 6.2 | 11.6 | 27.8 | 38.5 | 15.9 | 1.03 |
| S5 | 24.5 | 2.3 | 12.7 | 69.7 | 12.7 | 2.3 | 0.3 | 1.55 |
| S6 | 32.7 | 3.0 | 9.7 | 14.0 | 66.9 | 5.6 | 0.8 | 1.45 |
The composition of dry mixtures of plaster mortars
| Components | Symbols and compositions of dry mixtures, (% by weight) | |||||
|---|---|---|---|---|---|---|
| S 1 | S 2 | S 3 | S 4 | S 5 | S 6 | |
| Portland cement CEM I52.5 R | 15 | 15 | 15 | 15 | 15 | 15 |
| Quartz sand 0.0 ÷ 1.0 mm | 73.66 | 73.36 | 73.15 | 72.34 | 74.69 | 73.84 |
| Limestone powder 45 μm | 5 | 5 | 5 | 5 | 5 | 5 |
| Hydrated lime Ca (OH)2 | 5 | 5 | 5 | 5 | 5 | 5 |
| Pearlite | 1 | 1 | 1.5 | 2 | - | 0.5 |
| HEMC (Hydroxyethyl methyl cellulose) | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.13 |
| PVAc (Poly vinyl acetate) | 0.2 | 0.5 | 0.2 | 0.5 | 0.2 | 0.5 |
| Aerator 1 | 0.04 | 0.04 | 0.05 | 0.06 | 0.01 | 0.03 |
| Aerator 2 | 0.005 | 0.01 | 0.005 | 0.01 | – | – |
| Water * | 24 | 23 | 25 | 26 | 24 | 23 |
| w/c | 1.6 | 1.53 | 1.67 | 1.73 | 1.6 | 1.53 |