Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Bulk density and total porosity of gypsum composites after 35 days
| Parameters | Building materials | |||
| Pure gypsum | Gypsum and polymer | Gypsum and microspheres | Gypsum and aerogel | |
| Bulk density (kg/m3) | 998 | 940 | 921 | 920 |
| Total porosity (%) | 57.5 | 60.0 | 60.8 | 60.9 |
Constants A, B, C, D, E and F of equations (5–7)
| Building materials | Constants | ||||||||
| A | B | R2 | C | D | R2 | E | F | R2 | |
| Pure gypsum | 0.0010 | 0.7176 | 0.9782 | 0.5799 | 2.087 | 0.9871 | 0.0005 | 0.2984 | 0.9686 |
| Gypsum and polymer | 0.0012 | 0.8886 | 0.9943 | 0.6985 | 2.225 | 0.9689 | 0.0006 | 0.3622 | 0.9751 |
| Gypsum and microspheres | 0.0012 | 0.8090 | 0.9947 | 0.7230 | 2.275 | 0.9919 | 0.0006 | 0.3476 | 0.9936 |
| Gypsum and aerogel | 0.0013 | 0.8520 | 0.9918 | 0.6521 | 2.230 | 0.9965 | 0.0006 | 0.3290 | 0.9833 |
Values of thermal conductivity λ, specific heat Cp , thermal diffusivity a, standard deviations σ and uncertainty of variation u of the pure gypsum and gypsum with additives polymer, aerogel and microspheres after 35 days
| Parameters | Materials | |||
| Pure gypsum | Gypsum and polymer | Gypsum and microspheres | Gypsum and aerogel | |
| Thermal conductivity λ (W/(m⋅K)) | 0.3004 | 0.2556 | 0.2778 | 0.2821 |
| Standard deviation σλ (W/(m⋅K)) | 0.0039 | 0.0069 | 0.0088 | 0.0072 |
| Uncertainty uλ (W/(m⋅K)) | 0.0022 | 0.0034 | 0.0044 | 0.0035 |
| Specific heat Cp (J/(kg⋅K)) | 1,520 | 1,597 | 1,594 | 1,630 |
| Standard deviation σCp (J/(kg⋅K)) | 31 | 14 | 31 | 87 |
| Uncertainty uCp (J/(kg⋅K)) | 11 | 8 | 17 | 49 |
| Thermal diffusivity a (mm2/s) | 0.1923 | 0.1716 | 0.1930 | 0.2074 |
| Standard deviation σa (mm2/s) | 0.0018 | 0.0023 | 0.0087 | 0.0095 |
| Uncertainty ua (mm2/s) | 0.0009 | 0.0012 | 0.0044 | 0.0049 |